As American leaders became increasingly concerned about a British imperial conspiracy perceived depriving them of their freedoms, they created communication networks between the colonies. Beginning in 1773 colonial assemblies began to appoint committees of correspondence to warn others about possible abuses. Samuel Adams and Dr. Joseph Warren formed a committee in response to the Gaspée Affair, but it was Dabney Carr the one who proposed the formation of a permanent Committee of Correspondence. Adams wasn't a member.
The activities that most demonstrated Americans' belief in Manifest Destiny occurred during the 19th century, while thousands of settlers moved west and displaced thousands of natives.
Many Europeans had experienced the tyranny of monarchies in their own countries. The Patriots' war against George III inspired them. Lafayette and Pulaski may have also been moved by the ideas in the declaration of Independence. I hope this helps you
