The question of what a person is has a long history. On these pages you will find the most important thinkers discussed in Was den Menschen zum Menschen macht (engl.: What Makes the Human Human) — from ancient substance ontology (Aristotle, Boethius, Thomas Aquinas) via phenomenology (Husserl, Stein, Hildebrand, Heidegger, Levinas) to modern personalism (Wojtyła, Spaemann, Seifert). The overview is ordered alphabetically by surname; ancient and medieval thinkers without a modern family name appear under their customary name (Aristotle, Boethius, Alexander of Hales, Richard of St. Victor, Thomas Aquinas).