This document summarizes the principles of Appreciative Inquiry (AI), an approach to change that focuses on an organization or group's strengths. It describes the five original principles developed by David Cooperrider, including the Constructionist Principle which states that reality is co-created through language. It also outlines five additional principles proposed by other researchers, such as the Wholeness Principle about considering systems holistically rather than reducing them. The document provides definitions of AI and Appreciative Living, which applies AI principles to daily life, and cites sources for the principles.