Large-scale economic and social development programs were put in place, but the results were mixed. In 1974, under the influence of young revolutionaries - the "Ligueurs" - the government embarked on a socialist program: nationalization of strategic sectors of the economy, reform of the education system, establishment of agricultural cooperatives and new local government structures, and a campaign to eradicate "feudal forces" including tribalism. The regime banned opposition activities. Mathieu Kérékou was elected president by the National Revolutionary Assembly in 1980, re-elected in 1984. Establishing relations with China, North Korea, and Libya, he put nearly all businesses and economic activities under state control, causing foreign investment in Benin to dry up. Kérékou attempted to reorganize education, pushing his own aphorisms such as "Poverty is not a fatality", resulting in a mass exodus of teachers, along with numerous other professionals. The regime financed itself by contracting to take nuclear waste, first from the Soviet Union and later from France.