History, and the development of ideologies, does not stop. The great modern ideologies were a product of the tension between Europe’s industrialization and the static institutions Europe had inherited from its feudal past. As that tension recedes, other sources of ideological development have come to the fore, in a sometimes confusing mix of forces and tensions: the practical economic experiences of the United States, Europe, and Japan; the increasing problem of degradation of the environment; the resurgence of militant Islam; the discovery of youth and women as classes, even though Marxist socialism saw classes as based solely on economic position; and the division of interests between rich and poor parts of the world.