How long did it take Poybius to write his book The Histories?

The system of checks and balances was designed for what purpose? fear of strong state power to keep power out of one branch to appease the southern states to allow the judicial branch to have equal power

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?

The roosevelt corollary specifically states that the united states would play what role in latin america? a. mediator c. police power b. watchdog d. buffer state