Analyst Jessica Tuchman Mathews of the Carnegie Endowment for International Peace agreed that imposing democracy "from scratch" was unwise, and did not work.[15] Realist critics such as George F. Kennan argued U.S. responsibility is only to protect its own citizens and that Washington should deal with other governments on that basis alone; they criticize president Woodrow Wilson's emphasis on democratization and nation-building although it was not mentioned in Wilson's Fourteen Points,[65] and the failure of the League of Nations to enforce international will regarding Nazi Germany, Fascist Italy, and Imperial Japan in the 1930s. Realist critics attacked the idealism of Wilson as being ill-suited for weak states created at the Paris Peace Conference. Others, however, criticize the U.S. Senate's decision not to join the League of Nations which was based on isolationist public sentiment as being one cause for the organization's ineffectiveness.