Parfit argued that there is no essential self or soul that remains constant over time. Instead, he believed that psychological connectedness—such as shared memories, personality traits, and continuity of consciousness—is what truly matters. This view aligns with Buddhist philosophy, suggesting that we are more like a series of connected psychological states than a fixed entity.
Parfit's teletransporter thought experiment illustrates his belief that psychological continuity, not physical continuity, is what matters for survival. In the experiment, a person's molecules are copied and transmitted to another planet, where an exact replica is created. Parfit argues that the replica, having the same memories and personality, represents a form of survival, even if the original body dies.
Parfit's rejection of a fixed self led him to argue that the gap between individuals is narrower than traditionally thought. If there is no essential self, then the distinction between one's past, future, and other people diminishes. This perspective underpins his moral philosophy, which emphasizes impartiality and the reduction of suffering for all, regardless of temporal or spatial distance.
Parfit's disregard for his body and personal space mirrored his philosophical belief that the physical self is less important than the psychological self. His eccentric behaviors, such as exercising naked or removing clothes in public, reflected his view that the body is merely a vehicle for the mind. This detachment from physicality influenced his ideas about personal identity and morality.
Parfit was deeply committed to the pursuit of truth and saw philosophy as a collaborative endeavor. He generously spent hours tutoring students and discussing philosophical problems with colleagues, regardless of their stature. His altruism and focus on collective progress over personal credit were consistent with his broader ethical views on impartiality and reducing suffering.
Parfit's parents and grandparents were missionaries, instilling in him a sense of moral urgency and perfectionism. He applied this missionary zeal to his philosophy, striving to convince others of the objectivity of morality and the convergence of ethical traditions. His rejection of religion, particularly the concept of eternal damnation, also shaped his focus on human flourishing and the reduction of suffering.
All Souls College required Parfit to publish a book within three years to secure a senior research fellowship. This ultimatum forced him to compile his ideas into his seminal work, *Reasons and Persons*, which might not have been written otherwise. The book, published in 1984, cemented his reputation as a leading philosopher and addressed key themes like personal identity and obligations to future generations.
Parfit believed that individuals do not inherently deserve their circumstances, as these are shaped by environment and biology. He rejected the notion of punishment or reward based on desert, arguing instead for actions that objectively increase human flourishing and reduce suffering. This view was influenced by his early rejection of religion and the concept of eternal damnation.
David Edmonds discusses the life and work of Derek Parfit who died in 2017 in this episode of the Bio Bites strand of Philosophy. David is the author of a recent biography of Parfit.