Classical Marxian conflict theory is as old as sociology, but when does your text suggest modern conflict theories emerged? And how were these modern conflict theories different?
a. 1920s; utopia and progress were emphasized
b. 1990s; utopia and progress were rejected/doubted
c. 1930s; utopia and progress were rejected/doubted
d. 1960s; the possibility of progress (regarding inequality) rejected/doubted