Theodosius Dobzhansky Quotes
Seen in retrospect, evolution as a whole doubtless had a general direction, from simple to complex, from dependence on to relative independence of the environment, to greater and greater autonomy of individuals, greater and greater development of sense organs and nervous systems conveying and processing information about the state of the organism's surroundings, and finally greater and greater consciousness. You can call this direction progress or by some other name.
Dobzhansky, Theodosius. "Nothing in Biology Makes Sense Except in the Light of Evolution." The American Biology Teacher, vol. 35, no. 3, 1973, p. 128.
Theodosius Grygorovych Dobzhansky was a prominent Ukrainian-American geneticist and evolutionary biologist, and a central figure in the field of evolutionary biology for his work in shaping the modern synthesis. Dobzhansky was born in Ukraine, then part of the Russian Empire, and became an immigrant to the United States in 1927, aged 27.