Abolition movement gained strength in the northern America between 1830s to 1860s. Many abolitionists believe that slaveholding was a sin and others were involved to the non-religious free labor dispute, which held that slaveholding was reverting, inefficient and made economic sense. Every state in the northern part of United states abolished slavery. In northern states, there was a legislation passed about freeing the children of slave women. According to this, some states in south didn’t free their slaves and kept them until the 1827 and after that until 1865. There was no abolition in southern states, but anyone could free their slaves. Later on, the population in America of free black’s slaves went up. In the north, free blacks were so
