How were most people in ancient times enslaved?

Why didn’t the united states participate in the league of nations? the u. s. senate did not want the country to join. president wilson did not want the country to join. the league of nations was only for european countries. the league of nations had failed to prevent world war 1

Woodrow wilson called the supreme court "a constitution convention in continuous session." what did wilson mean by this?

Sparta faces threats from without and within the city-state who posed these threats.