Mensa membership is only slightly impressive.  Once you start
hanging around 130-160 IQ people you realize that they:

1.) Have no interest in their own "potential for the good of humanity"
(Average IQ of an MD is about 120).

2.) Have no interest in neatness.

3.) Have no interest in you.

        If everyone was in that range, society would grind to a halt.
Everyone would be watching Babylon Five and reading books.  As long as we
are discussing paleolithic people, people with real-high IQ's probably
wouldn't survive that well.  If the difference between Forest Gump and
normal is 80 vs. 100, imagine what 180 is in real terms.

(My IQ is @130, slightly below the Mensa cut off, due to low spelling
skills always messing up the test.  Factoring out spelling and
diget-symbol I rate about 145).