The american revolution is an example of how political boundaries can

The American Revolution is an example of how political boundaries can "transform", since prior to the revolution the colonies were under the political control of Great Britain, whereas after the Revolution they were autonomous. 

The  pan-african movement  was an "emotional, cultural, psychological and ideological  movement  that began among the  african  dispora in the western hemisphere, for a closer  purpose, so that  african  people could feel secure, attain political, economic as well as psychological power visa vis other races or world regions" .