It was during this voyage that he began to consider the issue with which his name is most often associated, namely the origin and evolution of species, including humans. He proposed that species evolved gradually by a combination of random mutation and natural selection over a long period of geological history. Thus the main questions he asked and answered concerned how species evolved and obtained their current forms.
<span>provide free labor and therefore an economic advantage to slaveholding states. let white men build businesses rather than work on the farm</span>
