Answer:
The rise of mass culture around 1900 was a result of a number of changes in society. Public education was becoming more widespread, allowing more people to gain access to knowledge and information. Improvements in communication technologies, such as the invention of the phonograph, allowed for the spread of ideas and information to a much wider audience. Additionally, industrial growth transformed American society, producing a new class of workers and providing a boost to wages of native-born workers. This, coupled with the expansion of industry in the two decades before 1900, led to a population growth of 15 million people in U.S. cities. These developments, coupled with more acceptance of immigrants and diversity, helped to create the mass culture that we know today.