Introduction : how to write history of biology
The place of biology in the sciences and its conceptual structure
The changing intellectual milieu of biology
Diversity of life. Macrotaxonomy, the science of classifying
Grouping according to common ancestry
Microtaxonomy, the science of species
Evolution. Origins without evolution
Darwin's evidence for evolution and common descent
The causation of evolution : natural selection
Diversity and synthesis of evolutionary thought
Post-synthesis developments
Variation and its inheritance. Early theories and breeding experiments
Germ cells, vehicles of heredity
The nature of inheritance
The flowering of Mendelian genetics
The chemical basis of inheritance
Epilogue : toward a science of science.
