Human knowledge has been changing from the word go and people in certain respects behave more rationally than they did when they didn't have it. They spend less time doing rain dances and more time seeding clouds.

Human knowledge has been changing from the word 'go,' and people, in certain respects, behave more rationally than they did when they didn't have it. They spend less time doing rain dances and more time seeding clouds.

Human knowledge has been changing from the word go and people in certain respects behave more rationally than they did when they didn't have it. They spend less time doing rain dances and more time seeding clouds.

Human knowledge has been changing from the word go and people in certain respects behave more rationally than they did when they didn't have it. They spend less time doing rain dances and more time seeding clouds.

Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.

Anything that gives us new knowledge gives us an opportunity to be more rational.