prior to European colonization in Africa, slavery had already existed between the people there, slave owners would willingly offer their slaves to the Europeans in order to protect them selves, the europeans can argue that they did not establish slavery, rather, they continued work that seemed beneficial to them.
The act authorized the president to grant Indian tribes unsettled western prairie land in exchange for their desirable territories within state borders (especially in the Southeast), from which the tribes would be removed.
Erik Homburger Erikson was a German-American psychoanalyst who was most famous for coining the phrase “identity crisis”.
He was also a neo-Freudian psychologist who believes in the Freudian theory and added his own ideas and beliefs. His theory of psychosocial development proposes that all people go through a series of eight stages.