Throughout human evolution our species has had many kinds of interacti
ons with others, including predatory, competitive, parasitic, mutualis
tic, and commensal. We still have such interactions in the modern worl
d, with the most important resulting from our domestication of other s
pecies. Domestication created new kinds of interaction by which we con
trolled the freedom and reproduction of certain animals. Because domes
ticated populations became dependent on humans various adaptations by
humans were necessary, and it is argued that these influenced the cult
ural, and possibly biological, evolution of our species.