The long period from the Renaissance to the nineteenth century supplied numerous sources for Kierkegaards thought in any number of different fields. The present volume covers the period from the birth of Savonarola in 1452 through the beginning of the nineteenth century and into Kierkegaards own time. The Danish thinker read authors representing vastly different traditions and time periods, and a diverse range of genres including philosophy, theology, literature, drama and music. The present volume consists of three tomes that are intended to cover Kierkegaards sources in these different fields of thought. Tome I is dedicated to the philosophers of this period who played a role in shaping Kierkegaards intellectual development.