The declaration of the rights and grievances of the colonies drafted by the nine colonies represented at the stamp act congress demonstrated that

The declaration of the rights and grievances of the colonies drafted by the nine colonies represented at the stamp act congress demonstrated that: the different colonies had to work together for a common goal
Even though each of those nine colonies have different agendas on their hand, they're all suffering under the rule of the British Empire. So for the purpose of getting them out of the country, the nine colonies united as one for the revolutionary war

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.