Theodosius Dobzhansky

Nothing in biology makes sense except in the light of evolution.

Evolution is a change in the genetic composition of a population over time.

The universe is not a static, finished product, but a dynamic, evolving process.

The diversity of life is not a static fact, but a dynamic process generated by evolution.

Evolution is not a theory, it is a fact. It is the fact that life has changed over time.

The human species is a product of evolution, and its future is in its own hands.

The genetic endowment of a species is its capital, and evolution is the process of investing that capital.

The concept of species is not a static pigeonhole, but a dynamic stage in the evolutionary process.

Evolution is not a ladder, but a branching tree.

The study of evolution is not merely an academic exercise, but a key to understanding ourselves and our place in the universe.

The genetic variation within a species is the raw material for evolution.

Evolution is not directed towards any ultimate goal, but is a continuous process of adaptation to changing environments.

The human mind is a product of evolution, and its capacity for abstract thought is a unique adaptation.

The concept of natural selection is not a cruel and ruthless struggle, but a process of differential reproduction.

Evolution is not a belief system, but a scientific explanation for the diversity of life.

The genetic code is a universal language, shared by all living organisms.

The future of humanity depends on our understanding of evolution and our ability to guide it responsibly.

The origin of species is not a single event, but a continuous process of divergence.

Evolution is not a random process, but a creative one, generating new forms and functions.

The human species is unique in its capacity for self-awareness and its ability to shape its own destiny.