Europe's Industrial Revolution began in Britain.
The major challenges to historical research revolve around the problems of sources, knowledge, explanation, objectivity, choice of subject, and the peculiar problems of contemporary history. Sources The problem of sources is a serious challenge to the historian in the task of reconstructing the past.
Nationalism. number 6 number 6
Explanation:
Industrial expansion and population growth radically changed the face of the nation's cities. Noise, traffic jams, slums, air pollution, and sanitation and health problems became commonplace. Mass transit, in the form of trolleys, cable cars, and subways, was built, and skyscrapers began to dominate city skylines.
