The purpose of this course is not to teach you how to tell right from wrong. That is something you will have to figure out for yourself. Instead, the purpose is to explore different ideas of right and wrong and the impact they have on the ways people think and act.
This is Ellen's seminar.
what [they] had in common was not a group of ideas, but a single idea — an idea about ideas. They all believed that ideas are not "out there" waiting to be discovered, but are tools — like forks and knives and microchips — that people devise to cope with the world in which they find themselves. They believed that ideas are produced not by individuals, but by groups of individuals — that ideas are social. They believed that ideas do not develop according to some inner logic of their own, but are entirely dependent, like germs, on their human carriers and the environment. And they believed that since ideas are provisional responses to particular and unreproducible circumstances, their survival depends not on their immutability but on their adaptability.

—Louis Menand, The Metaphysical Club, preface

“Modern” means different things in different disciplines. In philosophy, the period that is called “modern” runs from René Descartes (1596–1650) to Immanuel Kant (1724–1804). There are two routes through this period: “rationalist” and “empiricist.” The rationalist route runs Descartes, Spinoza (1632–1677), Leibniz (1646–1716), Berkeley (1685–1753), Kant. The empiricist runs Descartes, Locke (1632–1704), Hume (1711–1776), Kant. We will study the empiricists in this course, though the rationalists make good summer reading if you want to fill the gaps in your history of philosophy.