Charles Darwin has given the evolution theory. That was a big
contribution for science. he theorized that human and animals were
come from a common ancestor. which means we all have one common
genes. This theory gave a strong basis for psychology because in
present we try to understand the behavior on the basis of
biological process also and his theory was important contribution
of biology.
Darwin was influenced by the artifical selection also.
Artificial selection is the process of breeding animals, this
process is used for our desirable traits which is done by using
outsource rather than natural process.