Stuart, it sounds like you think that the life of the typical animal, and of the typical human in history, were not worth living -- you'd prefer that they had never existed. Since you seem to think your own life worth living, you must see people like you as a rare exception, and may be unsure if your existence justifies all the suffering your ancestors went through to produce you. And you'd naturally be wary of a future of descendants with lives more like your ancestors' than like your own. What you'd most want from the future is to stop change enough to ensure that people very much like you continue to dominate.

If we conceive of "death" broadly, then pretty much any competitive scenario will have lots of "death", if we look at it on a large enough scale. But this hardly implies that individuals will often feel the emotional terror of an impending death - that depends far more on framing and psychology.