The Federal Reserve

The Federal Reserve is a privately-owned, unconstitutional entity that controls the flow and production of money within the United States. With the passing of the 1913 Federal Reserve Act, Congress explicitly relinquished it's power of governing a Free Market economy to Corporate businesses and Investors. Federalism (separating power among distinct units) is intrinsically tied to the creation of the Constitution and should be upheld.

If the American people ever allow private banks to control the issue of their money, first by inflation and then by deflation, the banks and corporations that will grow up around them, will deprive the people of their property until their children will wake up homeless on the continent their fathers conquered. 

Thomas Jefferson

Money is power and the Federal Reserve simply holds too much power (Money = Power). The power vested in the 'Fed' is Unconstitutional (The power given to the Federal Reserve by the 1913 Federal Reserve Act should be limited to Congress) and substantially unbalances the checks and balances created in the Constitution.
Source (Image): Economic Apocalypse

Also Check Out
Zeitgeist - The Movie: Federal Reserve Part 2
Commentary: Bailouts Will Lead to Touch Economic Ride
JFK vs the Federal Reserve (Executive Order 11110)