Which economic system do most countries operate under today?

Why did european nations face financial challenges after world war 1?

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire

Discuss the main ideas of eugenics, and explain why it is no longer a prominent belief in the united states.