Although I think we will end up leaving, I think we should stay. The EU was set up after the first and second world wars to unite European countries and encourage peace, and there hasn't been a world war since. The complaints of how much money we waste on the EU will be NOTHING compared to the amount of money (and lives) that we would lose in the event of another world war. Particularly now, when relationships between countries are unstable, turning our back on the EU, the thing that has kept peace and unity within Europe for the last 50+ years is only going to increase the likelihood of world war 3.