"Borcis" wrote in message
...
Radi Khrapko wrote:

The answer is: we are alone because our Universe
is bad for a civilization. The combination of physical constants
does not need to be more fine tuned than is necessary to permit
one civilization and, since extreme fine tuning of the constants
is a very unlikely event, it is most likely that our Universe is
just good enough to permit development of only one
civilization.

Curiously enough, the assumption that we are alone would seem to
allow viewing as "significant fine-tuning" what we would otherwise
have to dismiss as probably irrelevant. Like the size of Moon, or its
apparent
diameter being the same as that of the Sun, say, or a lot of similar
coincidences that characterize our particular environment. I believe it
follows from your assumption that the more direct environment of the
unique
civilization that develops, must be regarded as very special.


There's no fine-tuning required to assume that in any significantly
large region of a galaxy that life evolves on one planet before it does on
others. It *is* possible that we're just the first in our neighborhood, if
not in our galaxy. [I think that the question of extra-galactic
civilizations is probably irrelevant from a practical perspective.]

Norm