The human psyche wasn't built to think in a long time frames.
Only man is, so far as we know, capable of having such thoughts.
With it are going most of the natural systems that keep us alive.
The terrible violence we see emerging from tribal societies is almost certainly an immune system reaction from the planet to this distraction of the awareness of the long scale of time. They are, without a doubt, a terrifying thing; but we must imagine for a moment the desperation that births them, which is a misguided, last ditch attempt to defend essential and vitally important traditional cultures from the destruction of the long time scale of myth and religion.
We don't see our behavior, in any set of circumstances, as connected to survival mechanisms for the species; yet all of them are. Even, as paradoxical as it may seem, terrorism. We may not understand that until we consider that the body will kill its own cells if it identifies them as containing pathogens. Cultures act in much the same way; right or wrong, these mechanisms aren't a unique aberration of the psyche. They mirror well known inner processes on a different scale, and in a different way.
Both the inner and the outer habitat are bound together by the soul; and we must know this if we wish to live, on any scale of time.
May your soul be filled with light.
Note to readers: this post is also found at my new bio-blog, the microbial octave, which features posts on man and the environment.