Answer to Post 421, 422, and 424

Answers will be in general. I can not manage to quote exact
paragraphs in internet yet.
1. I have been very glad to hear that space programs has positive sum
but I have suspects about it. I know that total cost was more than a
trillion dollars at 1985 only for USA and ex-USSR. It may not be paid
back in 15 years. Even sum is negative I have been and will be a
spacist during all my life. (I live in Turkey and my country is a
Thirld World country. Space topic is not interesting for public even
we have our own satellites.) This comes from my mental conditions. A
personel qouestion: Why are each of you spacists? (I know that I
won't be able to go to the space and I have learned to be used to it.)
2. Space colonies can not have more than, let me say, 10,000 people
totally in the next 100 years. They can not be self-sufficient in
that scale. It means we will live discontinuities during colonization.
3. Cultural problem: I always ask why human being has gone to space
in the last century, not before, not later. I don't belive in
historic determinism. To me cause-effect relationship for timing
comes from West Europe's history between 1500-1950. First stage was
imperialism (1500-1750), second stage was industrialization (1750-
2000). It does not belong to USA and ex-USSR 1950-2000. Cold War was
only the last step: Phenomenonization (or realization).
That is enough for second step. It is strange to me the same data can
be oppositely interpreted by me and you.