I think it was to convince people to reject gradual emancipation and demand the complete and immediate abolition of slavery.
John Calvin: The Religious Reformer Who Influenced Capitalism. Both the blame and the credit for capitalism has often been placed at the feet of a 16th-century Christian theologian named John Calvin.
to protect and enhance the rights of African Americans
The 13th Amendment ended slavery in the US. The 14th Amendment gave blacks citizenship and established due process. The 15th Amendment gave black men the right to vote.
These three amendments were passed toward the end and following the Civil War. They ended the practice of slavery releasing blacks throughout the South from enslavement. The 14th and 15th Amendments provided rights and Constitutional protect for blacks in addition to giving them the power to vote. However, Southern governments found ways around the amendments to prevent blacks from exercising their full rights.
Yes i am pretty sure he did because he wanted to spread more power out to the people
hope this helps