What are the reasons for the buffalo overkill?

Event : 1800s dual federalism / layer cake federalism effect on balance of power between local, state, and national governments : event : 1861-1865 civil war effect on balance of power between local, state, and national governments: event : 1933 new deal / cooperative federalism / marble cake federalism effect on balance of power between local, state, and national governments: event : 1964 start of great society effect on balance of power between local, state, and national governments: event : 1980s and 1990s new federalism devolution revolution effect on balance of power between local, state, and national governments: event : 2010 progressive federalism effect on balance of power between local, state, and national governments: