the scenarios Baxter and Egan write about only push the Great Filter up to the moment of being able to create self-replicating probes (the most basic form of explosive colonization).
i think that's actually the point after which filters have to contend with a diversity of "the psychology of the intelligences that evolve" (rather than at the emergence of biology, since biology is localized and subject to regularities in astrophysics such as supernovae).
how far are we from being able to produce such probes, and could our psychology become so idiosyncratic between now and then that we wouldn't deploy them?
i think that's actually the point after which filters have to contend with a diversity of "the psychology of the intelligences that evolve" (rather than at the emergence of biology, since biology is localized and subject to regularities in astrophysics such as supernovae).
how far are we from being able to produce such probes, and could our psychology become so idiosyncratic between now and then that we wouldn't deploy them?