· High Medieval Metaphysics (Plato, Aristotle, Augustine, Aquinas)

· Medieval Apophatic Theology & Mysticism (Eckhart, Cusanus)

· Medieval Nominalism (Scotus, Ockham)

{Reformation & Church History}

· Reformation Theology (Luther, Calvin)

· Baptist History & Early English Baptist Church History (Servetus, Smyth, Helwys, Jacob)

{Modern}

· Modern Pietism (Spener, Francke, von Zinzendorf)

· Modern Rationalism & Empiricism (Descartes, Spinoza, Leibniz, Hobbes, Locke, Hume)

· Modern Transcendentalism (Kant)

· Modern Religion & Christian Faith (Schleiermacher)

· German Idealism (Hegel)

{Late Modern (19th–Early 20th Century)}

· Late Modern Religious Studies & Philosophy of Religion (Otto, James, Campbell, Frazer)

· Late Modern Atheism (Feuerbach, Marx, Nietzsche)

· Late Modern Baptist Theology (Spurgeon, Rauschenbusch, Carey, Erickson, George)

· Late Modern Reformed Theology (Hodge, Kuyper, Bavinck, Schaeffer, Murray, Berkhof)

· Neo-Kantian Philosophy of Religion (Cohen, Windelband, Rickert, Troeltsch)

· Late Modern Positivism (Comte, Wittgenstein, Carnap)

· Philosophy of Life (Dilthey, Bergson)

· Psychology & Philosophy of Mind (Freud, Jung)

· Late Modern Jewish Mysticism & Ethics (Buber, Rosenzweig)

{Contemporary (Mid–Late 20th Century to Present)}

· Contemporary Philosophy of Science (Popper, Kuhn)

· Contemporary Phenomenology & Existential Philosophy (Husserl, Merleau-Ponty, Heidegger, Sartre)

· Existential Christian Philosophy (Tillich)

· Neo-Orthodoxy (Barth, Brunner)

· Christian Relational Philosophy & Theology (Bonhoeffer)

· Catholic Neo-Scholasticism & Transcendental Theology (Przywara, Rahner)

· Contemporary Catholic Theology (von Balthasar, Küng, Ratzinger)

· Existential Philosophy of Zen Buddhism (Nishida, Nishitani, Waldenfels)

· Ethical Phenomenology (Levinas)

· Contemporary German Apologetic Theology (Moltmann, Pannenberg)

· Philosophical Hermeneutics (Gadamer, Ricoeur)

· Contemporary Discourse Ethics (Habermas)

· Structuralism (Saussure, Lévi-Strauss, Althusser)

· Post-Structuralism (Derrida, Deleuze, Foucault, Lacan)

· Contemporary Marxism (Adorno, Lefebvre, Horkheimer)

· Catholic Phenomenology (Marion, Lacoste, Chrétien)

· Feminist Existential Philosophy & Post-Structuralism (Beauvoir, Irigaray, Butler)

· Religious Pluralism (Hick, Panikkar)

· Ecofeminist Theology (Ruether, McFague, Shiva)

· Process Theology (Whitehead, Hartshorne, Cobb)

· Philosophy of Artificial Intelligence (Turing, Newell, Simon, Bostrom, Dreyfus, Floridi)

· Postmodern Theology (Caputo, Vanhoozer)

· Posthuman Theology (Hefner, Waters, van Huyssteen)

· Christian Analytic Philosophy (Alston, Plantinga)

· Scientific Theology & Theology–Science Dialogue (Barbour, Peacocke, Polkinghorne, McGrath, Peters, Lennox, Craig, Moreland, Grudem)

· Theistic Evolution (Teilhard de Chardin, Collins)