History of Policing – Key Concepts and Milestones (Review Cards)
Origins and Evolution of Policing
Policing started as a private matter in early societies; citizens protected themselves and maintained order.
Uniformed, organized police departments were rare historically.
Modern-style police in France appeared in the 14th century; in England in the 19th century.
The first law enforcement professionals were unpaid magistrates (judges) appointed by citizens in Athens starting around the 6th century BCE; private citizens arrested offenders and punished them.
Romans began electing magistrates around the 3rd century BCE and created the first specialized investigative unit, questors, or “trackers of murder,” around the 5th century BCE.
Townspeople formed watch groups at town borders/gates to protect against outsiders.
Around the 1st century BCE, Augustus selected highly qualified military members to form the Praetorian Guard to protect the emperor and palace.
Augustus established the Praefectus Urbi (Urban Cohort) with executive/judicial power to protect the city and the Vigiles of Rome; the Vigiles started as firefighters and later gained law enforcement duties, patrolling Rome day and night; they are considered the first civil police force for citizens’ protection and their name contributed to the notions of vigilance and vigilante.
In the 1st century CE, lictors served as bodyguards for magistrates, delivering punishments, including death, and their authority was symbolized by fasces (bundles of rods tied with a red thong around an axe).
In the 12th–13th centuries, European kings began to assume responsibility for administering the law, replacing private defense with official officials.
In 13th-century Paris, Louis IX appointed a provost to enforce law and supervise the night watch; investigating commissioners and sergeants assisted.
In 1356, France created the Maréchausée, a mounted patrol that patrolled highways; it evolved into the Gendarmerie Nationale, policing areas outside major French cities.
By the 18th century, Paris and Munich had armed, professional police credited with keeping cities safe.
By the 18th century, urban centers increasingly had armed, professional police; the era included notable modernization and centralization of policing.
Sir Robert Peel is generally credited with establishing the first English police department, the London Metropolitan Police, in 1829, though earlier English references to organized law enforcement appear in the 9th century ( Alfred the Great ), with a system of mutual pledge to protect communities.
Mutual pledge system in England: organized security responsibilities into tiers from the village level up; tactics included hue and cry, which required citizens to assist when called.
Chief components of early English policing in the mutual pledge era included tithings (10 families), hundreds (groups of 10 tithings, about 100 households), and shires (counties) overseen by a sheriff; watch and ward, hue and cry, and parish constables were introduced formally over time; these formed the rudimentary urban policing framework.
The Statute of Winchester (1285 CE) formalized watch and ward and parish constables; required males to serve night watch and to keep weapons for maintaining the peace; hue and cry required citizens to respond to disturbances; this laid groundwork for metropolitan policing.
In the 17th century, England saw a rise of centralized government with a hierarchical system of authority; magistrates, beadles (assistants to constables), and later thief-takers emerged as informal/private policing figures; corruption was common.
Thief-takers: private citizens who were paid by the king for each arrest; widely used to combat highway robbery and other offenses; they operated without official status and often framed innocents or colluded with criminals; rewards varied by offense and could lead to dangerous practices.
Henry Fielding (18th century) and Sir John Fielding advanced criminal investigation with Bow Street activities; they formed the Bow Street Runners, a private investigative unit that eventually received public funding.
Fielding and the Bow Street operation began collecting lists/descriptions of stolen property and issued public calls for information; this established the first official crime reports.
Bow Street Runners were private citizens initially, allowed to accept thief-taker rewards; government later provided funding.
In 1763, Fielding created a civilian horse patrol in London; in 1763 Fielding’s Bow Street office expanded investigative capacity.
In 1770, a small permanent foot patrol in London emerged; in 1798, Patrick Colquhoun established the Marine Police to patrol the Thames (some view this as England’s first civil police department); in 1804, a horse patrol with uniformed officers was established.
The 18th–19th centuries saw increasing demand for a large, organized civil police force in London due to industrialization, population growth, poverty, and crime; finally, in 1829, Peel’s Metropolitan Police Act created a large, organized, paid force; 1,000+ officers were hired.
Early London police wore distinctive uniforms (three-quarter-length royal blue coats, white trousers, top hats) and were commanded by commissioners; Peel, Rowan, and Mayne emphasized public respect and mutual trust; early officers were expected to reflect high personal ideals and be acceptable to the public.
Although Peel is associated with modern policing, he was not a police officer himself; his contribution was political leadership and passage of the police bill that established the Metropolitan Police.
Peel’s early principles influenced modern policing and anticipated community policing concepts; Peel’s Nine Principles are described later in detail (see separate section).
The English model of policing became influential in the United States as a model for American police structures and practices; London’s Metropolitan Police emphasized the beat system, focusing on familiarizing officers with their districts and communities.
Paris’s police used periodic, roving roving patrols, not repeated same-post assignments, which hindered close community contact.
The Nine Principles and the Beat System
The Metropolitan Police adopted Peel’s Nine Principles, emphasizing crime prevention, public approval, voluntary compliance, impartial service, minimal use of force, public accountability, separation of police from judiciary, absence of crime as the measure of efficiency, and community-police relationship where police are the public and the public are the police.
Peel’s principles emphasized prevention and community collaboration, foreshadowing modern community policing and preventive strategies.
England’s beat system: police assigned to small, permanent posts to become familiar with locals; contrasted with Paris’s roving patrols that did not build neighborhood familiarity.
The Metropolitan Police Act (1829) established a professional, civilian police force under the Home Secretary; Peel’s leadership and the beat-based approach helped ensure public accountability and legitimacy.
United States: Colonial and Early American Policing
Early American policing replicated the English model; sheriffs were central in the counties; they collected taxes, supervised elections, and performed other duties; most sheriffs were not salaried, paid per arrest (similar to English thief-takers).
In cities, the town marshal was the chief law enforcement official, aided by constables and night watchmen; in some places, night watch was performed by the military.
Boston established the first colonial night watch in 1631; a constable position followed in 1634; Nieuw Amsterdam (New Amsterdam) had paid watchmen by 1658; the British inherited this system when taking over in 1664 and renamed it New York.
By the mid-1700s, New York’s night watch gained notoriety for perceived laziness and corruption; policing in the Americas often combined public and private enforcement elements.
Slavery shaped policing in the American South; slave patrols became the precursors to modern policing in many southern states; patrols aimed to capture runaways, protect slaveholders, and uphold social order under slavery.
Slave codes (1660s onward) defined enslaved people as property; patrols and police systems were designed to maintain the economic system of slavery; patrols helped enforce discipline and prevent insurrection; African Americans and enslaved people faced limited rights.
The Dred Scott decision (1857) reinforced the status of enslaved people as property, not citizens, in many contexts.
The American North developed civil policing similar to England, with sheriffs and local watch systems; urbanization and immigration in the 19th century led to more formal policing.
Urban American Policing in the 19th Century
Early urban police in the United States were heavily influenced by English models; Boston (1838) established the first organized police department with eight officers; by 1851, night watch duties were integrated; 1853 saw the first city police chief; 1854 saw the construction of police stations; 1859 introduced uniforms.
New York City established a police department in 1845; officers began on-duty 24/7 by 1845; uniforms were mandated in 1853; there was political conflict (the “police civil war”) between rival factions (Municipal Police vs. Metropolitan Police) culminating in 1857 at City Hall.
Philadelphia established its police department in 1854; by the Civil War era, several major cities had developed formal police departments that replaced the night watch system; they assumed greater patrol and investigative duties but remained entangled with local politics.
The North American policing landscape was deeply influenced by political control, corruption, and mob influence; reform efforts emerged over time, culminating in professionalization movements in the 20th century.
Frontier, State, and Private Policing in the United States
Frontier life relied on sheriffs, town marshals, U.S. marshals, the Army, and state militias; posse comitatus (power of the county) allowed mobilizing male citizens to enforce the law when necessary.
Vigilantism and lynching were common in the Old West due to limited formal police presence; many famous frontiersmen were both lawmen and outlaws in practice.
The Posse Comitatus Act of 1879 limited federal military involvement in civilian law enforcement, except where explicitly authorized by law.
Texas Rangers (1830s–1840s onward) and other Western state-level police agencies emerged in the early 20th century as state-level enforcement bodies; Texas Rangers became a model for state police elsewhere (Arizona Rangers, New Mexico Mounted Patrol).
Private policing emerged prominently in the late 19th century; Allan Pinkerton founded a private detective agency (1850) that served railroads, mining, and private security; Pinkertons gained fame for thwarting assassinations (e.g., the Baltimore Plot) and for pursuing outlaws (e.g., James Gang, Butch Cassidy) and labor associations (e.g., Molly Maguires, Homestead Riots).
Wells Fargo established a private security presence to protect shipments and carry gold; private companies employed guards to protect valuable assets and assets in transit.
Competing private security groups (Pinkertons, Rocky Mountain Detective Association, Wells Fargo security) contributed to a broader private policing landscape that sometimes intersected with public police powers.
The Progressive Era, Reform, and Professionalization
The late 19th and early 20th centuries saw attempts to curb politics-driven policing and promote professionalism.
The International Association of Chiefs of Police (IACP) was founded in 1893 to promote professional policing and civil service rules; it advocated removing political influence and establishing merit-based recruitment.
The Pendleton Act (1883) established a civil service system that favored merit-based appointments and reduced political influence in policing.
The Law Enforcement Assistance Administration (LEAA) was created in 1968 as part of the Omnibus Crime Control and Safe Streets Act; LEAA funded research, education, and training, spending billions and promoting state planning agencies.
LEAA-funded projects included the Kansas City Preventive Patrol Experiment, the RAND Corporation’s study of criminal investigation, the Police Foundation’s study of team policing, and the Newark Foot Patrol Experiment; these studies shifted policing away from routine three traditional strategies toward new approaches.
The 1960s–1970s saw a shift toward greater professionalization and formal education for officers; civil service rules were widely adopted; the IACP influenced reforms; technology and data collection advanced policing.
Key Leaders and Concepts in 20th-Century Policing
August Vollmer (Berkeley, 1905–1932): Pioneered professionalizing policing; integrated university training for officers; introduced psychological testing and advanced training; helped develop criminology education; trained many future police leaders; widely regarded as the father of modern American policing.
O. W. Wilson: Expanded professional management in policing; advocated for rapid response, one-officer patrol cars, and managerial efficiency; authored key texts on police management; led the Chicago Police (1960–1967) and the UC Berkeley School of Criminology.
Raymond Fosdick and Bruce Smith: Early police researchers; Fosdick published European Police Systems (1915) and American Police Systems (1920); Smith surveyed ~50 leading American cities (late 1930s–1940s) and wrote Police Systems in the United States (1940/1949).
J. Edgar Hoover: Director of the FBI from 1924–1972; expanded professionalism of the federal agency; created the FBI Uniform Crime Reports, the NCIC, the Ten Most Wanted program, and the FBI Academy; helped popularize the “G-man” image; later faced criticism for overreach and surveillance.
Kefauver Committee (1950): Senate Crime Committee investigations revealed connections between organized crime and law enforcement; contributed to calls for reform.
The 1960s–1970s era saw a wave of reforms responding to civil rights movements, corruption scandals (e.g., Knapp Commission in NYC), and a push toward civil service and professional standards.
Civil Rights Era, Legal Developments, and Judicial Influence
The 1960s featured a revolution in civil rights and a series of Supreme Court decisions shaping policing and individual rights.
Mapp v. Ohio (1961) extended the exclusionary rule to the states, limiting admissibility of illegally obtained evidence.
Escobedo v. Illinois (1964) defined the right to counsel during police interrogation; Miranda v. Arizona (1966) established the requirement to inform suspects of their rights before questioning.
The Civil Rights Movement (1960–1965) included Freedom Rides, James Meredith’s enrollment at University of Mississippi, and King’s leadership; federal marshals and National Guard intervened to enforce rights when local authorities were unable or unwilling.
Notable civil rights events included Birmingham (1963) and the famous Birmingham police’s use of hoses and dogs; the 1963 March on Washington; the Selma to Montgomery marches (1965).
The 1960s also saw significant campus protests (e.g., Columbia University, 1968), and violent clashes between police and protesters; media coverage amplified public scrutiny of policing.
The era produced critical national commissions addressing policing and civil disorders:
President’s Commission on Law Enforcement and Administration of Justice (1967) – The Challenge of Crime in a Free Society and task force reports.
Kerner Commission (1968) – The report on civil disorders; warned of two separate societal systems (two societies, one black, one white) and highlighted tension between police and minority communities.
President’s Commission on Campus Unrest (1970) – Addressed campus protests and unrest.
The Knapp Commission (1970) investigated corruption within the NYPD; sparked reforms and reshaped anti-corruption practices; led to broader ethics discussions and reforms addressed in later chapters.
The era also saw concerns about mass media and public perceptions of the police during demonstrations and riots; the public’s trust in police was tested by events like the Rodney King incident (1991) and subsequent LA riot (1992).
The Police, Technology, and Modern Practice
The late 20th century saw major technological advances in policing:
Telegraph and Morse code: 1850s–1860s; call boxes (Cincinnati, 1881) replaced by telephone communications later; centralization of communications modernized response.
Early adoption of patrol motorcycles (1913) and patrol cars (early 20th century) transforming response times and coverage; the radio became central in the 1930s–1940s, enabling rapid coordination.
The rise of centralized records, fingerprinting, and investigative technologies; the interval between police operations and community contact widened due to motorized policing; this would influence later policing philosophies.
Community policing and problem-solving policing emerged in the 1980s–1990s as a response to the limitations of traditional policing approaches; these concepts emphasize the cop on the beat, community engagement, and addressing underlying issues to reduce crime.
CompStat (late 1990s) emerged as a data-driven management and accountability process within the NYPD; it involved regular, prescriptive crime-statistics briefings (semiweekly) and accountability for precinct commanders; it uses computer-generated maps to guide strategies, with a four-step process:
Timely and accurate intelligence
Use of effective tactics in response to that intelligence
Rapid deployment of personnel and resources
Relentless follow-up and assessment
The 1980s–1990s also saw the rise of police parmilitary units (PPUs, precursor to SWAT) to address hostage situations, terrorist acts, and mass shootings; PPUs grew from under 10% of agencies in the early 1970s to over 89% by 1995.
Despite successes in crime reduction and modernization, the era faced ongoing concerns about misconduct, corruption, and civil rights violations; notable cases include the Rodney King beating (1991), the Abner Louima case (1997), and the O. J. Simpson trial (1995).
The 1990s and 2000s saw emphasis on diversity in policing: increased representation of women and minorities; civil rights protections; affirmative action and class-based hiring policies to address historic inequities in law enforcement.
Sheriff’s Departments and the Sheriff’s Role
The sheriff is an ancient, elected office; historically, sheriffs have been the lead law enforcers in counties and have broader responsibilities beyond policing, including jail administration, inmate transport, court services, and civil process.
In many states, sheriffs’ deputies are more focused on corrections; the jail and “care, custody, and control” of inmates can be paramount; deputies also perform transport, warrants, and security operations.
The sheriff’s department often serves as a critical backbone of the criminal justice system, providing county-level coverage when municipal police are absent; in some jurisdictions, sheriffs’ offices operate SERT (Sheriff’s Emergency Response Teams) to manage riots, hostage situations, and large-scale incidents within jails and communities.
Deputies may work in both corrections and line police work, providing a bridge between the urban police and the county jail system; the narrative in the transcript emphasizes the anonymity and essential support role sheriffs play in ensuring public safety.
The sheriff’s office and urban police often coordinate on major investigations and joint operations; the sheriff may handle prison transport and post-arrest processing while city police handle street-level enforcement and major investigations.
Notable Personal Narratives and Practical Realities
A personal account from a former sheriff’s deputy describes the realities of jail work, the “worst unit” homicide housing, and the experience of policing from within a jail setting; highlights include:
The day-to-day reality of working in a crowded, dangerous environment with high-risk inmates.
The sense of anonymity and internal culture within the sheriff’s office, including power struggles, codes of silence, and departmental politics.
The journey from jail to street assignments and the desire of deputies to transition to patrol and other roles.
The behind-the-scenes nature of many sheriff’s department activities and their critical role in the criminal justice system that goes largely unseen by the public.
The Civil Rights Era and Its Aftermath (Summary)
The Civil Rights Movement transformed policing through a focus on equal protection under the law and reforming police–community relations.
Supreme Court cases in the 1960s–1970s expanded defendants’ rights and constrained police practices, contributing to a new dynamic between law enforcement and civil rights protections.
The 1960s–1970s period exposed deep tensions around policing, race, and civil liberties; federal commissions prompted reforms and greater attention to police accountability and the social implications of policing.
Since then, policing has continued to grapple with balancing crime prevention, public safety, community trust, and constitutional rights within a changing social and technological landscape.
Real-World Relevance and Implications
The evolution from private, community-driven enforcement to organized, publicly funded police departments reflects shifting ideas about the role of the state, citizens’ rights, and societal order.
The tension between maintaining public safety and protecting civil rights remains central to policing debates: the balance between force, community engagement, and accountability guides modern reform efforts.
Technology and data-driven approaches (e.g., CompStat) have reshaped policing strategy, requiring careful attention to privacy, fairness, and the potential for bias in analytics.
The role of politics in policing history (e.g., patronage, corruption, reform movements) underscores the importance of independent oversight, civil service protection, and professional standards in shaping effective and legitimate law enforcement.
The history of policing in the United States illustrates the interplay between federal, state, and local authorities and the ways in which regional differences (e.g., North vs. South, urban vs. rural) influence policing styles and ethics.
Notable Concepts, Names, and Terms to Remember
Praetorian Guard; Praefectus Urbi; Vigiles of Rome; lictors; fasces
Maréchausée; Gendarmerie Nationale
Bow Street Runners; Henry Fielding; Bow Street Horse Patrol; Patrick Colquhoun; Marine Police; Fielding’s public crime reports
Peel’s Metropolitan Police; Sir Robert Peel; Robert Rowan; Richard Mayne; Peel’s Nine Principles; beat system; public policing under state control
Thief-takers; private policing; corruption and reward structures
Sheriff; constable; night watch; posse comitatus; frontier policing; private detectives (Pinkerton); Wells Fargo guards; Texas Rangers
IACP; Pendleton Act; LEAA; LEEP; federal crime data (UCR); NCIC; Knapp Commission; Wickersham Commission; Kefauver Committee
CompStat; CompStat2.0; police performance metrics
PPUs/SWAT; private security; community policing; problem-solving policing
Civil rights-related cases: Mapp v. Ohio; Escobedo v. Illinois; Miranda v. Arizona
Major civil disturbances: Harlem 1964; Watts 1965; Detroit 1967; Newark 1967; Chicago 1968; LA 1992
Columbia University campus unrest; the Knapp Commission findings; the Rodney King incident (1991); O. J. Simpson trial (1995)
Key Dates (Selected)
6th c BCE: Athens magistrates; private enforcement
1st c BCE: Roman Praetorian Guard; Praefectus Urbi; Vigiles
1285 CE: Statute of Winchester
1356 CE: Maréchausée established
1763: Bow Street Runners formed; civilian horse patrol
1770: London foot patrol established
1789–1798: Colquhoun’s Marine Police; 1804: London horse patrol
1829: Metropolitan Police Act; first large-scale, uniformed civil police force in London
1838–1859: New York, Boston, Philadelphia early American police development
1845: NYPD created; 1853 uniforms mandated; 1857 City Hall riot
1854: Philadelphia Police Department established
1860s–1900s: Telegraphs, call boxes; transition to centralized communications
1893: IACP founded; 1883: Pendleton Act
1905–1930s: Progressive era reforms; Vollmer and Wilson innovations
1920s–1930s: Prohibition era; Wickersham Commission (1931)
1950s–1960s: Kefauver Committee; civil rights milestones; Supreme Court expansions
1967–1970: National commissions; Knapp Commission (NYC)
1990s–2000s: CompStat; PPUs; major urban riots (LA 1992) and reforms
Connections to Foundational Principles and Real-World Relevance
The shift from private to public policing parallels broader governance trends: increasing legitimacy, accountability, and public trust as prerequisites for effective law enforcement.
The Beat System’s aim to embed officers within communities aligns with modern community policing and problem-solving approaches, seeking legitimacy and cooperation rather than mere deterrence.
The civil rights era highlighted the need for constitutional protections in policing, shaping modern searches, interrogations, and rights-at-arrest practices.
Data-driven management and specialized units (CompStat, PPUs) reflect a move toward efficiency and targeted crime reduction, but raise concerns about overreliance on quantitative metrics and the potential neglect of broader social determinants of crime.
The history of policing reveals the persistent tension between authority and civil liberties, order and justice, tradition and reform—issues that continue to shape contemporary policing policy and practice.