<span>Reformers established the 18th amendment which prohibited the sale, consumption and production of alcohol in the United States. They also tried to created a movement called the Temperance movement, which encouraged citizens to not drink alcohol. Both of these methods failed due to bootlegging and public outcry.</span>
If citizens are unhappy if a piece of legislation and want it struck down they have the right to call a referendum. This allows the people to vote on it directly.
The congress was very powerful at the time and needed to be put in line. The two branches were created to control it. The remaining two branches were not specifically enumerated as thoroughly because they were still weak at the time and their power developed over time.