*shrug* I can't help but notice that every action of almost every single organism on the planet is simply geared towards ensuring survival. Thats it. I don't get why, but everything just wants to keep on surviving. It could effectively be argued that people are slightly different, where only MOST of what we do is geared towards survival, except perhaps the strive for some forms of knowlege (I say some because MOST of it IS used to ensure our survival, medicine, understanding of space, weather patterns, etc.) and leisure. Most leisure activities are, or at least, WERE geared towards being fit and healthy, again for survival, but recently some leisure activities have become counter-productive, along with an increasing desire for people not to have children. So yeah, we're a bit of an anomaly ourselves, but in short, I'd just say 'Survival'.