This correlate fine with what we observe and with the Fermi paradox. That is, there are no indications of intelligent life elsewhere in the universe. When Frank

This correlate fine with what we observe and with the Fermi paradox. That is, there are no indications of intelligent life elsewhere in the universe. When Frank Drake first turned his radio telescope to the sky and started to listen, he expected the ether to be full of radio signals from other civilizations. To his astonishment it was silent. Obviously there is a "great filter" in place which prevent intelligent life to evolve in abundance. And this article seems to point to such a filter. Nick Bostrom has an interesting philosophical take on this http://www.nickbostrom.com/papers/fermi.pdf http://www.nickbostrom.com/papers/fermi.pdf