This document provides an overview of diasporas, including conceptualizing the term, important characteristics, typologies, the importance of diasporas, and challenges. It specifically examines the Chinese and Indian diasporas in detail, comparing their histories, distributions, cultures, and experiences. Key points covered include the large sizes and wide distributions of the Chinese and Indian diasporas, with the Chinese diaspora being mostly in Southeast Asia and the Indian diaspora more widely scattered. State responses to diasporas and issues around citizenship and identity are also discussed.