The prussian king i've promised a constitution and reforms but did not keep his promise

Frederick  william iv.

he declined his program of reforms and providing of constitution as reaction to the nationalist  revolution of 1848 known as march revolution

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.