Originally posted by DigiOffered for consideration...
Well, Death Terror is giving it a concrete name. I prefer to just refer to it as "our intrinsic nature" to leave in other possible explanations. I don't doubt that fear of death is part of it, but part of it also derives from our tendency to gravitate to social groups, or the cognitive dissonance that arises when we can't rationalize the world around us, or other factors I'm not thinking of.
Everything we think, do and say is geared toward distancing ourselves from DT. As individuals, as a species, we seek power. It's mostly unconscious, of course, and its influence takes on different manifestations at different levels. But all other drives can be traced back to this. If you can't stay alive, you can't do anything else.