In the early 1920s, a great opportunity seemed to arise for Esperanto when the Iranian delegation to the League of Nations proposed that it be adopted for use in international relations, following a report by Nitobe Inazō, an official delegate of League of Nations during the 13th World Congress of Esperanto in Prague. Ten delegates accepted the proposal with only one voice against, the French delegate, Gabriel Hanotaux, who employed France's Council veto privilege to squash all League attempts at recognition of Esperanto, starting on the first vote on 18 December 1920 and continuing through the next three years. Hanotaux did not like how the French language was losing its position as the international language and saw Esperanto as a threat. However, two years later the League recommended that its member states include Esperanto in their educational curricula. The French retaliated by banning all instruction in Esperanto in French schools and universities. The French Ministry of Instruction said that acceptance of Esperanto would mean that "French and English would perish and that the literary standard of the world would be debased". Nonetheless, many people see the 1920s as the heyday of the Esperanto movement.