Post racial era refers to the United States being free from racial discrimination, segregation and preference.
Barack Obama was elected President of the United State in 2008 and was regarded as the first black president of the county. This made people to conclude that the United States has truly reached its post racial era.
Answer: the Union believed in a unitary country, free from slavery and based on equal rights; conversely, the Confederates did not want to abolish slavery
