Whenever I discuss Judaism, I frequently define the corpus of Jewish ritual, law and thought as a behaviorist religion.
Normative Orthodox Judaism does not involve itself in theological or philosophical discussions. When we learn Torah (the Written Law) and Talmud (the Oral Law), G-d is a given. The 613 mitzvot — prescriptive commandments and prohibitions — are another given. The Talmud struggles with how human beings — as individuals and as members of families, communities, and humanity — can best serve HaShem through our daily actions.