Sociology emerged in the 19th century during a time of social upheaval due to revolutions. Early sociologists like Auguste Comte, who coined the term "sociology", and Herbert Spencer shaped the discipline. Comte focused on social order/stability and social change. Spencer proposed social Darwinism. Karl Marx viewed history as class conflict between the bourgeoisie and proletariat. Emile Durkheim is regarded as the founder of functionalism and studied the social causes of suicide. Max Weber critiqued Marx and studied bureaucracies and rationalization. American sociology began at the University of Chicago in the early 20th century and later expanded to other schools.