yes it was Inevitable. tensions about slavery and southern state rights were bound to explode along with calls for secession And boy did they happen. It started with the south seceding. The rest of the united states didn't take the secession seriously though until the south attacked a fort and raided it for munitions and supplies. then and only then did the civil war fully explode into a reality.
Social Darwinism viewed the wealthy aristocracy, or upper class, as having the most socially valued class. It was believed that social status was largely heredity. This means that the social classes were divided due to genetics.