The Economist Book of Isms is a wonderfully illuminating and erudite guide to every ism you could ever want explained.
Entries include: Absurdism, Altruism, Atheism, Bohemianism, Buddhism, Capitalism, Colonialism, Cubism, Darwinism, Deism, Determinism, Epicureanism, Fanaticism, Feminism, Freeganism, Globalism, Hedonism, Historicism, Humanitarianism, Imperialism, Institutionalism, Islamism, Isolationism, Jingoism, Keynesianism, Libertarianism, Localism, Maoism, Militarism, Modernism, Multiculturalism, Neoconservatism, Nihilism, Optimism, Orientalism, Paganism, Pan-Africanism, Poststructuralism, Quietism, Racism, Rastafarianism, Realism, Republicanism, Romanticism, Sikhism, Stoicism, Structuralism, Surrealism, Symbolism, Taoism, Thatcherism, Unionism, Utilitarianism, Veganism, White Nationalism, Zionism, Zoratrianism.