How many of the states had to ratify the united states constitution in order for it to take effect?

9 states

Explanation:

the deaths of over a million communist soldiers

post-traumatic stress disorder in veterans

president thomas jefferson hoped that the embargo act of 1807 would the united states by demonstrating to britain and france their dependence on american goods, convincing them to respect american neutrality and stop impressing american seamen. instead, the act had a devastating effect on american trade.