A primary source provides direct or firsthand evidence about an event, object, person, or work of art. Primary sources include historical and legal documents, eyewitness accounts, results of experiments, statistical data, pieces of creative writing, audio and video recordings, speeches, and art objects.
They didn't go far enough because although all types of institutionalized racism was forbidden by constitutional means, it didn't stop people from being racists. They still behaved like racists and often it would happen that people of color would get punished much more in court than Caucasian people, or people who were racists and did bad things against the African-American population would walk free, especially in smaller communities.
While it was true that western lands were somewhat more fertile than the now-depleted lands of the East, many of the pioneers were attracted to the frontier in order to speculate in land, i.e. to purchase large quantities of cheap government land and to sell it at a profit to later comers
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