College enrollment reached 9 million by the end of the 1960s. Colleges and universities in America had more students than ever before, and these institutions often tried to restrict student behavior to maintain order on the campuses. To combat this, many college students became active in causes that promoted free speech, student input in the curriculum, and an end to archaic social restrictions. Students joined the antiwar movement because they did not want to fight in a foreign civil war that they believed did not concern them or because they were morally opposed to all war. Others disliked the war because it diverted funds and attention away from problems in the U.S. Intellectual growth and gaining a liberal perspective at college caused many students to become active in the antiwar movement. Another attractive feature of the opposition movement was the fact that it was a popular social event.