The Greater Good Science Center at UC Berkeley:

The Greater Good Science Center studies the psychology, sociology, and neuroscience of well-being, and teaches skills that foster a thriving, resilient, and compassionate society.

They have a series of Virtue White Papers, including:

• Future-Mindedness (pdf)

Their Future-Mindedness paper focuses on the science of prospection at the individual level throughout their lifespan. Would taking the concept of Future-Mindness and the Science of Prospection and expanding them to all of humanity and extending them to the end of time turn them into Longtermism?