In my opinion, it was because the agricultural revolution mainly.
        
             
        
        
        
Answer:
Eventually, the march went on unimpeded -- and the echoes of its significance reverberated so loudly in Washington, D.C., that Congress passed the Voting Rights Act, which secured the right to vote for millions and ensured that Selma was a turning point in the battle for justice and equality in the United States.
Explanation:
I hope this helps you!<3
 
        
             
        
        
        
Authority justifies a state's use of power over its citizens.