Federalism has evolved in the United States over time from dual federalism to cooperative federalism to new federalism. Under dual federalism from 1789 to 1945, the national and state governments each had distinct, non-overlapping areas of responsibility. From 1945 to 1969, cooperative federalism saw the different levels of government interact cooperatively to solve common problems. Since 1969, new federalism advocates for limiting federal power and devolving some programs back to state control.