At Effective Altruism Wooster we’ve run similar events with great success. As described in this EA Forum post our talks were 1-3 min long. But we’ve also run it with longer talks.
We’ve also done a variation of this with the talks being about particular cause areas and only one, longer talk per event.
Thank you very much for this great reply! I’ll certainly check them out once I get back to thinking about population ethics.
I do want to make clear that the approach I took in this paper was one of seeing what views and implications would “flow” from reductionism, rather than one of finding the best theory to accommodate our existing moral intuitions in light of some new fact.