In an era marked by climate breakdown and global inequality, Reimagining Peace Through Process Philosophy develops a positive image of the future, and a co-creative path towards that vision inspired by process philosophy. This first chapter provides an orientation to the field of process philosophy, also known as “process thought” and “process metaphysics.” It distinguishes: (1) the practice of process thinking, as a mode of thought that emphasises contexts, relationships and participation; (2) the metaphysics of process thinking, the view of “things” not as static but as relational-processes, activating a narrative of cosmological and community participation; and (3) the applications of process thinking, such as in ecological economics, complex systems theory and in addressing issues such as the “global systemic crisis.” This chapter starts to sketch a positive image of the future, connecting peace theorists’ aspirations for “positive peace,” “peace with justice,” and “peace systems,” with process philosophers’ visions of “ecological civilization.”