Abstract: Invasive ant species increasingly threaten ecoystems around the world and incur billions of dollars in damages each year. These ants owe a large part of their success to polygyny, a colony structure with multiple reproductives that gives the invasive ants an edge over their competition. This review weighs the benefits and disadvantages of polygyny in ants and explores an extreme form of polygyny called unicoloniality. It also specifically explores literature regarding the invasive tendencies of Argentine ants and potential methods of control for their continual expansion.