yes I should've been a little more clear sorry .. :">
I think that all these factors are the sole reason we have reached this level of technology, or maybe I should say, been "allowed" to reach it ..
"The Earth's orbit is very close to being a perfect circle, but not quite. It is somewhat elliptical, which means that the distance between the Earth and the Sun varies over the course of the year. This effect is too weak to cause the seasons, but it might have some influence over their severity. And every 21,000 it reaches a maximum, which have a small effect on climate!
the 21,000-year cycle is does not seem to be very important climatologically because the Earth's orbit is almost circular - the distance to the Sun at perihelion is only about 3% less than its distance at aphelion. That is, whether perihelion occurs in January or July, it seems unlikely that our seasons would be much affected. At least, that is the case now; but the eccentricity of the Earth's orbit (how elliptical it is) changes over very long periods of time, from almost zero (circular orbit) to about three times its current value. The eccentricity of the orbit varies periodically with a time scale of about 100,000 years!" (taking from a website I didn't want to write it all myself)
and during our civilizations development we were in a very stable orbit (calm weather and a lesser frequecy of earthquakes and volcano eruptions), but now we are moving towards the more extreme outer orbit .. which will cause an even more severe ice-age than the one that occured 11,000 years ago ..
now if that is combined with a magnetic polar shift, the consequences could be quite bad!
that was my point .. we have been lucky so far, but within the next couple of thousand years weather and mother Earth, won't be so kind .. hopefully we will reach the needed level of technology to combat these events!