Which group did Sam Adams start so that the colonists in various colonies could communicate with each other?

Sam Adams started The Committees of Correspondence so that the colonists in various colonies could communicate with each other.

The Committees of Correspondence were provisional Patriot emergency governments established in response to British policy on the occasion of the American Revolution throughout the 13 colonies. Also, The Committees of Correspondence served as a vast network of communication throughout the 13 colonies between Patriot leaders.

He started the sons of liberty.