Bipolarity is destabilising and dangerous, as both sides will continually advance their military, diplomatic and economic resources at the expense of, and in defence against, the other, creating suspicious and hostility and preventing the conditions for a lasting peace from occurring. Liberals define the Cold War by its mutual distrust, citing the fear in the US which led to the Cuban missile crisis and threat of nuclear war. Liberals argue that, without bipolar tensions, powers can come together and resolve issues in a stable, multipolar world.