In the first quote from Carnegie in Wealth and Its Uses, what does Carnegie mean by "contributing most to the hive"?

Which progressive reform was least related to the causes and effects of world war i? legislation limiting the use of child labor establishing 8-hour workdays for railroad workers reducing tariffs on imported goods expanding women’s rights and the right to vote

The public space for government speech in ancient athens was called

In 1819, what did the united states obtain from spain for $5 million?