Scientific theories said that dark-skinned people were less intelligent than white people and misguided theories justified the passage of laws that kept African Americans from voting.
Battle of Yorktown its the answer :D
The Neolithic Revolution and Industrial Revolution had many similarities and differences. One of which they shared, being that they both saw an increase of population. Both were in separate time periods, this resulted in different inventions essential to that historical era. The Industrial Revolution brought in machines, a better work industry, and much more advanced resources for society. The Neolithic Revolution yielded farming tools and such during a time where inventions were sparse. Overall, their differences and similarities led to one another.
The 15th amendment gave African american male citizens the right to vote. The 19th amendment gave women the right to vote which was not added until the early 1920's.