Introduction to Anthropology: Human Diversity and the Nature of Science
Anthropology and Human Variation
Anthropology is the intellectual property carved out for studying human variation in all its splendor and trust. It examines what it means to be human in diverse ways.
Overlap with other Fields: Genetics and Sickle Cell Anemia
Anthropology naturally overlaps with many other fields, such as genetics. While a geneticist focuses on the structure and function of genetic material (DNA), anthropologists are interested in these aspects from the standpoint of diversity.
Example: Sickle Cell Anemia
There is a gene that codes for a part of the hemoglobin protein in blood.
An abnormal version of this gene leads to a different type of hemoglobin.
Inheriting this abnormal gene in a double dose (from both parents) results in sickle cell anemia, a debilitating and historically lethal condition. Without modern medical interventions (e.g., exercise regimens, occasional blood transfusions), individuals often died before the age of 6.
Some populations have a negligible incidence, while others have a very high frequency of this genetic disease, illustrating population-level genetic variation.
Dimensions of Human Diversity
Anthropology primarily investigates two crucial aspects of human diversity: biological and cultural.
Biological Diversity
Human beings are biologically structured in specific ways that influence our interaction with the world.
Physical Traits: Our forward-facing eyes provide acuity and depth perception, unlike the peripheral vision of a horse or deer. We have five digits, enabling complex manipulation.
Neurological Wiring: We are neurologically wired to process information in particular ways.
There is clear biological diversity within the species Homo sapiens.
Cultural Diversity
Our interaction with each other and the world is profoundly shaped by culture, which comprises complex orders of meaning.
The Nature of Culture
Culture consists of learned and shared meanings, including signs, symbols, knowledge, beliefs, and assumptions.
It is acquired by growing up in a specific cultural context and is not genetically determined (there are no genes for culture).
Culture mediates all our relationships—between individuals, within broader society, and with the material world—by organizing experiences, defining reality, setting expectations, and guiding actions.
Language is a prime example of culture. The sounds we make only carry meaning because of shared cultural knowledge. Speaking a different language (e.g., ancient Thracian as a hypothetical example) would be unintelligible without an understanding of its shared meanings.
Beyond language, culture encompasses beliefs, assumptions, and entire worldviews, shaping our ideas about reality, categories of things and people, and what we consider true.
Cultural Influences and "Common Sense"
Culture affects us most profoundly and often invisibly, making culturally constructed ideas appear natural and self-evident, requiring no explanation.
People in different cultural contexts often have different forms of "common sense," highlighting the powerful, often unconscious, influence of culture.
Cultural Contrast: Gender Stereotypes
Stereotypical attributes often associated with genders (e.g., males as strong, confident, assertive, aggressive; females as smaller, emotional, intuitive, indecisive) are culturally constructed.
These attributes map to social positions and opportunities. For instance, qualities deemed necessary for leadership (assertiveness, strength) are often stereotypically male.
Such discussions are rarely politically neutral.
Cultural Relativity: The Trobriand Islands
The concept of parental roles, specifically the father's nurturing investment, varies culturally. What Americans find natural regarding a father's role might be viewed as "backwards" by Trobriand Islanders, and vice-versa, demonstrating the relativity of cultural norms.
Science and Cultural Context
Science, while claiming objectivity, is conducted by individuals raised in particular cultural contexts.
Scientists can unwittingly bring their cultural assumptions (e.g., about gender, economic order) into their theories, potentially naturalizing socio-culturally structured forms (e.g., power relations).
Recognizing this influence is a significant and even frightening responsibility for scientists when forming theories.
Anthropology Through Time: Historical and Evolutionary Perspectives
Anthropology also examines how human biological and cultural aspects have changed over time.
Cultural Change: The Example of Usury
Usury, the practice of charging interest on a loan, was historically considered an "unnatural" and heinous crime.
In antiquity, figures like Aristotle argued against it.
In the early 14^{th} century, Knights Templar were burned at the stake in Paris for committing usury.
Today, charging interest is fundamental to capitalism. This dramatic shift highlights how culture changes profoundly over time.
Similarly, concepts of gender—whether it's a binary, its fixity at birth—are subject to negotiation and cultural change.
Biological Change: Human-Chimpanzee Genetic Relationship and Common Ancestry
Genetically, humans are the most similar creatures to chimpanzees on Earth. We share approximately 98\% of our DNA with them.
Remarkably, a human is genetically more similar to a chimpanzee than a gorilla is.
This similarity is due to a common ancestor that humans and chimpanzees shared approximately 7 to 10 million years ago.
This does not mean humans evolved from chimpanzees; rather, both modern humans and modern chimpanzees evolved along separate lines from that common ancestor (analogous to cousins sharing grandparents, not one being the ancestor of the other).
The Primate Order
Humans belong to the biological group called primates.
This group includes us, all apes, monkeys (Old World like baboons/macaques, New World like spider/squirrel/howler monkeys), and other creatures like lemurs, lorisans, and tarsiers.
All primates share some similarities but also exhibit significant biological differences, which have changed over evolutionary time.
Defining Anthropology: Scope and Subfields
Anthropology is defined as the study of human biological and cultural diversity across time and space.
Four Classic Subfields
Sociocultural Anthropology: Investigates social and cultural differences in human beings across various world regions and through historical periods.
Linguistic Anthropology: Focuses on language as a special aspect of culture, exploring its diversity and how it shapes human thought and expression.
Archaeology: Reconstructs human sociocultural diversity through time in the past, often for peoples without written records, by excavating and interpreting material remains.
Biological Anthropology: Explores human biological diversity across space (different populations today) and time (evolutionary history).
Focus of Biological Anthropology in this Course
This course will concentrate on three main areas within biological anthropology:
Human Biological Variation: Examining biological differences among contemporary human populations. A crash course in genetics will be provided to ensure foundational understanding.
Primatology: Investigating our fellow primate relatives, including their taxonomy, evolutionary history, behavior, and forms of social organization (e.g., the work of Jane Goodall).
Paleoanthropology: Exploring human and primate evolutionary history through the fossil record and other evidence of the past.
Applied Uses of Anthropology
All subfields have practical, applied uses in addressing specific human problems, ranging from environmental impact assessment to designing comfortable airplane seats based on human variation in body measurements (e.g., "butt size," leg length).
Understanding Science: Epistemology and its Characteristics
Biological anthropology conceives of itself as a science, necessitating a clear understanding of what science is and isn't.
Epistemology: Ways of Knowing
Epistemology is fundamentally a way of knowing or a method of building knowledge about ourselves and the world.
There are numerous epistemologies beyond science:
Religious traditions are epistemologies for understanding the world based on faith and doctrine.
Aesthetic pursuits (e.g., art, music) provide knowledge by making us perceive the world differently, connecting ideas in new ways.
Good stand-up comedy can be an epistemology, transforming our understanding of everyday trivialities by revealing unexpected connections.
Characteristics of Scientific Epistemology
Science is distinguished by several key characteristics:
Empirical and Testable
Science formulates models about how the world works based on direct experience, observation, and measurement.
It generates ideas (theories) that can be challenged and tested against real-world phenomena (e.g., controlled experiments, ethnographic studies).
Science seeks explanation and prediction.
Focus on Natural Laws
Scientific explanations are sought in terms of natural laws and processes, not supernatural intervention.
While the existence of supernatural forces is not denied, they cannot be measured or empirically tested within the scientific framework, making them difficult to discuss scientifically.
The Challenge of Objectivity: Scientific Racism
A significant challenge for science is achieving true objectivity, as scientists, like all humans, are embedded in particular cultural contexts with ingrained assumptions.
Example: Scientific Racism in 19^{th} Century Britain
Debates in British intellectual circles questioned the origins of human races: monogenesis (all races having a single common origin, with subsequent differentiation) vs. polygenesis (different races having independent origins, effectively as different species).
Many proponents of the polygenesis position were heavily invested in the British textile industry, which relied on cheap cotton produced by enslaved Africans in the American South.
The Enlightenment philosophy championed ideals like "all men are created equal," as stated in the U.S. Declaration of Independence.
To reconcile these ideals with the institution of slavery, scientific racism emerged. It argued that Africans were a "different race" and therefore "not really men," effectively disqualifying them from fundamental rights and justifying their enslavement.
This historical context demonstrates how economic interests and cultural biases can influence scientific theorizing, even leading to seemingly objective scientific explanations for socially constructed inequalities.
How vs. Why: The Limits of Scientific Explanation
Science fundamentally answers "how" questions, focusing on the mechanisms and processes that explain phenomena.
It does not answer "why" questions, which delve into purpose, meaning, or ultimate causation.
Example: A Plant Growing Toward the Sun
A scientific explanation describes how it happens: Chloroplasts in plant cells perform photosynthesis using sunlight. Differential sunlight exposure on different sides of the stem leads to varying rates of cell division. Cells on the shaded side divide faster, causing the plant to bend and grow towards the sun.
This explanation details the biological mechanisms but does not address why the plant "wants" sunlight in a teleological sense.
"Why" questions (e.g., meaning of life, death, love) are crucial for human beings across all cultures, providing meaning and guiding existence.
While science may not answer these questions, it doesn't invalidate them. There isn't necessarily a conflict between scientific and other epistemologies (like religious ones) if they address different types of questions.
Science has its uses, but also its inherent limits.
Assumptions, Proof, and Provisionality in Science
An assumption is something held to be true without direct evidence or argument.
Proof is typically possible only within a closed logical system (e.g., mathematical geometry) where statements are derived from initial axioms or postulates (assumptions).
Mathematical proofs, such as proving angles congruent, rely on fundamental assumptions like the associative, commutative, or distributive properties, which are memorized, not proven.
The validity of any proof rests on the validity of its underlying assumptions.
Science makes assumptions (e.g., existence of space, time, cause and effect, uniformitarianism).
However, science is an open logical system, not closed by initial assumptions:
Scientific inquiry aims to make as few assumptions as possible.
Crucially, science is willing to change its assumptions if evidence warrants it, unlike a closed mathematical system.
Due to its open nature, no scientific idea is ever truly "proven" in the absolute, mathematical sense. Scientific ideas are provisional, constantly subject to testing and falsification.
Evaluating competing scientific ideas involves comparing their usefulness in explaining phenomena and their simplicity (Occam's Razor), favoring models with fewer assumptions if they explain data equally well.