The Prioritization of Prospection.

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Humans frequently engage in mental time travel, reflecting on the past and anticipating the future. Although these processes may seem similar, research documents systematic differences between retrospection and prospection. We propose a conceptual framework to organize and explain these differences based on three axiomatic temporal asymmetries: The past occurs before the future; the past is more certain than the future; and the past is less controllable than the future. People's experience with these axiomatic differences is internalized and overgeneralized to shape mental representations of the past and future. Our review shows that people generally prioritize prospection over retrospection, attending more to the future than the past and reacting more intensely to future events than to past events. We consider potential moderators of and constraints on the generality of prioritizing prospection. We explore the implications of these temporal asymmetries, emphasizing their theoretical and practical significance. While daily life centers on the present, people often reflect on the past and anticipate the future. But which direction of mental time travel-backward or forward-has more influence? We identify three key differences that shape how people engage with the past and future: time flows from past to future, the future is more uncertain, and people have more control over the future. These differences affect the frequency, intensity, and nature of thoughts and feelings, leading to predictable biases in how we mentally represent and emotionally engage with events over time. Because focusing on the future often provides greater benefits, people tend to prioritize prospection over retrospection in everyday life.