text: which do you believe has a greater influence on human behavior nature,nurture or both?   if by nature you mean as a person is born, including heredity and genes, i believe this influences human behavior by about 50%.  however, the nurturing a human receives via parents, friends, teachers, and others a person meets and/or sees in life then influence a person's behavior by about 50%.  a person starts out with certain characteristics and learns to deny or appreciate, accept or seek out scenarios which then show that person what he/she enjoys or not.  life is choices.  so i would need to say "both".