Answer:
Airplanes were used for war at first
<span>The first Battle of the Marne.</span>
Abolitionists ended slavery
It's B they wanted the diamonds they had, the oil, land, and slaves
"Mass society<span> is any </span>society<span> of the modern era that possesses a </span>mass<span> culture and large-scale, impersonal, social institutions. A </span>mass society<span> is a </span>society<span> in which prosperity and bureaucracy have weakened traditional social ties" This is the definition of mass society theory. I would thus hypothesize that mass society strengthens the economy greatly but likely abolishes leisure activities for the sake of economic success.</span>