The world of early-stage financing has undergone many changes over the years. In this note, we first document the historical roots of early-stage investors, and describe important milestones along the developmental path. We then describe the types of modern-day angel investors, focusing on their investment preferences and practices. Finally, we set up a discussion of salient issues in angel investing for the future. Available for purchase from European Case Clearing House and Harvard Business Publishing, link provided below.