On Jan. 31, more than three years after the people of the United Kingdom had voted for it, Britain left the European Union in a move nicknamed “Brexit.” The reasons for this are complex, but the clearest motive was outlined by Boris Johnson, a leader of the movement who is now the country’s prime minister.

In a speech during the Brexit campaign, Johnson noted that 60% of the laws passing through the British Parliament and becoming the law of the U.K. came from decisions made by the EU in Brussels.