person

• Egoism


  Ayn Rand
• Hedonism


  Jeremy Bentham
• Metaethics


  George Edward Moore
• Emotivist theory


  Alfred Jules Ayer
• Language, truth, logic


  Ludwig Wittgenstein - student
• Phenomenology


  Edward Husserl - founder
• Phenomenology


  Martin Heidegger - his student
• French Philosopher


  Jean-Paul Sartre
• Existentialism


  Soren Kierkegaard - Father of