What is "ideologies"

Usage examples of "ideologies".

Islamic fundamentalism, which serves as an umbrella for many variants of a number of political ideologies, has in recent years eroded the power of centralized and authoritarian political systems in the Middle East.

Mad philosophies appeared, swept the mob, only to be discarded in favor of outlandish ideologies, which, in turn, were casually cast aside for doctrines still more extreme.