The clause of the united states constitution that requires states to support the laws and court decisions of other states is the:

The Full Faith and Credit Clause is the name used to refer to Article IV, Section 1 of the United States Constitution, which addresses the duties that states within the United States have to respect the "public acts, records, and judicial proceedings of every other state."

It developed as a reaction to the impact of european colonialism in africa on peoples of african descent. in the  mid-20th century, activists in africa adopted pan-africanism as a rallying cry for independence from colonial rule. some african pan-africanists sought to unite the continent as one independenthope it was useful