Darwin 386

Preface to the Second Edition

Correlated Growth: Parts of the organization are interlinked; variation in one part leads to modifications in others.
Sexual Selection: Initially critiqued; emphasized as applicable to humans and elaborated in this edition.
Criticism: Similar criticisms faced by sexual selection as faced by natural selection; belief in its power remains.
Acceptance: As naturalists become familiar with sexual selection, it will gain acceptance, having been positively received by some.

Objective: This work presents a compilation of notes regarding the origin of man, without previous intent to publish.
Evolution of Thought: Early thoughts restricted publication due to potential prejudice against these views.
Current Acceptance: Stronger acceptance of species as modified descendants of others, against independent creation.
Natural Selection: Emphasis on the accepted notion of natural selection, with acknowledgment of skeptics.
Research Goals: Focus on whether man descends from pre-existing forms, his development, and the value of differences among races.
Evidence of Antiquity: Reference to the high antiquity of man supported by recent work; no need for exhaustive details on differences among races.
Comparison with Apes: Highlighted by Huxley's work, showing man differs less from higher apes than these do from lower primates.
Contribution of Other Naturalists: Acknowledges the work of others like Lamarck and Hackel contributing to the understanding of man's origin.
Sexual Selection's Role: Important in differentiating human races; fully treats this in the second part of the work.

Bodily Structure Variations: Inquiry into whether man varies in body and mind and if these variations are transmitted.
General Laws: Variations in man governed by laws similar to other organisms (correlation, inheritance).
Anomalies and Development: Investigation into whether humans show abnormalities or revert to ancestral traits.
Racial Differences: Distribution and impact of varieties and races across the globe.

Structure Comparison: Similar structural foundation with mammalian skeletons, with distinctions in muscle and organ arrangement. | In grey format | have human structure compared with apes whereas man is shown to differ less with higher apes than previously noted mammals. |

Disease Susceptibility: Evidence of shared susceptibility to diseases between humans and other animals as proof of similarity in structure.
Internal and External Parasites: Similarities between parasites affecting humans and those affecting other mammals.
Physical Regeneration: Human healing processes akin to other mammals' recovery abilities.
Developmental Processes: Similar embryonic processes observed in human and lower vertebrates.
Rudimentary Structures: Examination of rudimentary organs in humans as evidence of evolutionary history.

Differences Between Sexes: Notable differences in size, strength, hair growth, etc.; man's secondary sexual characteristics significantly influenced by sexual selection.
Comparison to Quadrumana: Observable parallels in secondary sexual characteristics between humans and primates.
Mental Power Variability: Mental powers of humans also shaped by sexual and natural selection, leading to observable differences in capabilities between men and women.

Conclusion Validation: Man's descent from less organized forms supported by numerous points of evidence illustrating geological succession and species affinity.
Importance of Sexual and Natural Selection: Both processes significantly contributed to human development and race differentiation; their respective roles in shaping physical (organ structure, muscular power) and mental (intellect, social behaviors) capacities.
Reflections on Humanity's Evolution: Recognition of mankind's background as tied to a brutal struggle between weaker and stronger for survival leads to insights about current social constructs and moral evolution, questioning the implications of these ancestral traits in modern society.