(I mean, ersatz intergenerational communication)

I was intrigued by this project, Dear Tomorrow, where people are invited to write letters to the future to commit to take action against climate change. T. Shum's paper suggests this increases "the willingness to donate to climate change mitigation efforts" - by raising the concern with the prospects of future generations. This fits my priors - and it reminded me of the impact Bostrom's Letter from Utopia had on me.

I wonder if one could extrapolate this idea to long-termism in general - e.g., inviting people to write messages to their descendants in different future periods, regarding distinct global issues... Or even the opposite: make them write to an ancestor (as if they are the utopians in Bostrom's tale), commenting on the latter's  nuisances and on the pros and cons of the present. Maybe there's something like that already, and I just don't know how to google it? Maybe it would be cool for us to try something like that in EA groups and workshops?