States, its "complete elevation of the Black Panther Party as the revolutionary group in the United States" and its "total collusion with every nationalist fake the world over, from Nasser to Nkrumah". During the 1970s, the PLP began to shape its activity around racism in the United States, forming a mass organization called the Committee Against Racism (CAR). A CAR convention held in New York City in July 1976 drew 500 participants. The organization made use of aggressive direct action tactics against its perceived opponents, disrupting presentations by the controversial psychologist Arthur Jensen and the physicist William Shockley in the spring of 1976. The CAR were the most vocal of the hostile critics of the sociobiologist E. O. Wilson. The organization picketed in Harvard Square and handed out flyers calling for demonstrations against sociobiology, which in their view was being used to defend individuals and groups responsible for racism, war, and genocide. In 1977, the organization, now renamed the International Committee Against Racism (InCAR), made headlines by disrupting an academic conference by pouring a pitcher of water on Wilson's head while chanting "Wilson, you're all wet". Structure According to the constitution adopted at the time of the PLP's formation in 1965, membership was open to anyone at least 17 years old who accepted the program and policies of the party, paid dues and required assessments and subscribed to party publications. Supreme authority within the organization was to be exerted by national conventions, held every two years. The convention was to elect a National Committee to handle matters of governance between conventions. The PLP's primary party unit was the "club", organized either on a shop, territorial, or functional basis. All party members were required to be active members of a club and bound by the principles of democratic centralism, in which decisions of higher bodies were considered binding on participants in lower bodies. During the 1960s, new members were additionally required to undergo three months of ideological training, usually in small group settings in individual houses. Owing in part to the significant economic and extensive time requirements expected of its members, the PLP has since its inception been a small cadre organization, with an "estimated hard-core membership" of about 350 in 1970, supplemented by numerous sympathizers. Members during the 1960s were predominantly from white, middle-class backgrounds, shunned drug use, and tended "to dress neatly and wear short hair", according to a