Yes, generally speaking it is true that a <span>significant development of agrarian communities was the spread of language, since such advancement led to the "diversification of labor"--which helped ideas of many different kinds spread more easily. </span>
It allowed the people to vote on whether or not they want slavery. This meant that the states with people who wanted slavery could have it regardless of the congress and that's exactly what happened. It relieved tension because people could choose and the congress couldn't bother them.
