Thinking about the past as the past for the past's sake: Why did temporal reasoning evolve?

Hoerl & McCormack discuss the benefits of temporal reasoning mainly with respect to future planning and decision making. I point out that, for humans, the ability to represent particular past times has distinct benefits, which are independent from contributing to future-directed cognition. Hence, the evolution of the temporal reasoning system was not necessarily driven primarily by its benefits for future-directed cognition.