I believe the fifteenth amendment was truly necessary. While the topics covered in the amendment may seem strange to some people in today's world, the laws addressed many issues, particularly in the south. These laws are still needed to today to ensure everyone has the same rights. Assuming certain laws are not required can be dangerous.
Yes, the fifteenth amendment was necessary. While the fourteen freed all people in the Union, the fifteenth amendment was necessary to provide those people with the right to vote. This was an important milestone that, while fought every step of the way, eventually led to women gaining the right to vote as well.
The Constitution's fifteenth amendment prohibits the government from denying a citizen the right to vote on the basis of "race, color, or previous condition of servitude." That amendment was absolutely necessary because many people tried to stop freed black slaves from exercising their right to vote. Some people are still trying to keep minorities from voting today!
The fifteenth amendment was very necessary. It sped up the equal rights movement by allowing everyone the right to vote regardless of their race, color, or previous condition of servitude. Without this amendment America wouldn't have become the nation it is today. Without this amendment hate groups and inequality would have been stronger for a longer period of time than it was present for.