Torah im Derech Eretz (Hebrew: תורה עם דרך ארץ – Torah with "the way of the land") is a philosophy of Orthodox Judaism articulated by Rabbi Samson Raphael Hirsch (1808–88), which formalizes a relationship between traditionally observant Judaism and the modern world. Some refer to the resultant mode of Orthodox Judaism as Neo-Orthodoxy.
The phrase Torah im Derech Eretz is first found in the Mishna in Tractate Avoth (2:2): "Beautiful is the study of Torah with derech eretz, as involvement with both makes one forget sin". The term derech eretz, literally "the way of the land", is inherently ambiguous, with a wide range of meanings in Rabbinic literature, referring to earning a livelihood and behaving appropriately, among others.
In the Talmud and Midrash, there are approximately 200 teachings concerning derech eretz as decent, polite, respectful, thoughtful, and civilized behavior. One representative teaching is that "Derech eretz comes before Torah" (Midrash Vayikra Rabbah 9:3) – one cannot personify Torah until he demonstrates derech eretz in everything that he does. There are many more such teachings in the rishonim and acharonim (post-Talmudic authorities). The mussar literature, in fact, presents an entire body of thought devoted to the subject of middot (character traits) and "behaving like a mentsh" (refined human being). Here, the way that one behaves is regarded as an external manifestation of one's middot.