1903-1989
Austrian behaviorist and early leader in the field of ethology.

Konrad Lorenz played a lead role in forging the field of ethology, the comparative study of animal behavior, and helped regain the stature of observation as a recognized and respected scientific method. Along the way, his observations—particularly of greylag geese —led to important discoveries in animal behavior. Perhaps his most influential determination was that behavior, like physical traits, evolves by natural selection. In one of his many books, On Aggression, he wrote, "Historians will have to face the fact that natural selection determined the evolution of cultures in the same manner...