What common
characteristics did reform
movements of this era
share?

Nowadays radical and reform movements use social media.

In the early 1800's there were newspapers and some 'vocal' newspaper owners/editors.

You may want to start with a few of these.

albany plan of union, 1754. the albany plan of union was a plan to place the british north american colonies under a more centralized government

the correct answer is history and tradition.