Answer:
it was either to hide their cities or it was for spiritual reasons correct me if I'm wrong 
Explanation:
 
        
                    
             
        
        
        
The control unit for an artificial heart was invented by Otis Frank Boykin.
        
             
        
        
        
some were revolutionary were u didn't have cars u had to walk by foot, horse, by boat to have transportation it wasn't easy n they had to do it for miles n miles now we look back as how transportation was even invented but it was now we have millions of ways of transportation ways doesn't matter from planes to technology, etc.
 
        
             
        
        
        
Answer:
Easy because they killed them and put them into slavary and brought dieses 
Explanation: