In message <6aca6bc0-1c68-4916-ad98-32742cd69806@t54g2000hsg.googlegroups.com>, Friar Broccoli <EliasRK@gmail.com> writes

On Aug 13, 8:38 pm, John Harshman <jharshman.diespam...@pacbell.net>
wrote:

K_h wrote:
> Fermi's paradox suggests that there are little or no other intelligent
> civilizations within the Milky Way galaxy.  On the other hand, intelligent
> life should exist on a substantial fraction of planets with life because
> natural selection broadly increases intelligence with time.

Does it? News to me. What evidence do you have that this is the case?

There has been an increase in the intelligence of a broad range of
species on earth with time.

More accurately, a few isolated branches of metazoans have shown increases in intelligence in the last 500 million years.

The majority of metazoans show little change in intelligence in that time and the vast majority of biomass on the planet lacks a nervous systems.