What causes a civilization to fall?

Also a Civilization could fall for any reason from killing the king to starting war inside

Explanation:

From the collapse of ancient Rome to the fall of the Mayan empire, evidence from archaeology suggests that five factors have almost invariably been involved in the loss of civilizations: uncontrollable population movements; new epidemic diseases; failing states leading to increased warfare; collapse of trade routes

aa

explanation:

literally the answer is aa. not kidding. aa is a group.

texas governor sam houston opposed secession, but was unable to prevent it. in this speech, given prior to lincoln's election, he presents the argument that slavery would be safer within the united states than outside of it. it was a prescient argument, and one held by several other southern leaders.

have a good day pls vote me brailyest