Slaves were used in the American colonies to perform labor because A. there were not enough workers.
America needed workers, but there were not enough people willing to perform such difficult jobs for basically no money at all, which is why they brought slaves who had to work for free.
Franklin D. Roosevelt's farm policy was primarily designed to reduce production in order to boost farm prices
The property taxes that you pay are used for a number of things such as road construction, the police and fire department, and organized recreation in your area.