This document discusses the importance of accounting theory and provides an overview of different theories of accounting. It explains that accounting theories aim to explain, predict, or prescribe accounting practices. Early theories were developed through induction based on observations of actual accounting practices. Starting in the 1960s, normative theories attempted to prescribe what accountants should do rather than just describe existing practices. Positive accounting theory seeks to explain and predict which accounting methods managers will choose based on self-interest. No single theory is universally accepted, and theories cannot be proven, but are continually refined through logical deduction and evidence.