According to nature, fear is the greatest motivator. Animals survive simply because of the fear of not surviving.
Evolution is a never ending arms race between species; when one develops a skill to outcompete the other, the other responds with a new skill as well, or just improving the skill that originally worked. A real time example is in the mechanism of diseases, and the childish stock piling of weapons of mass destruction:
Although humans are a part of nature, we are separated by the fact that we don’t live just to survive. While a plant or animal’s main goal is to reproduce viable offspring or obtain food to eat, most humans’ main goal is different. Not better, just different. Seeing our lives as more valuable than the plants and animals around us develops an unhealthy ego; we’re all here for important but different reasons. This is depicted in Maslow’s Hierarchy of Needs:
For these reasons, our fears are similar but usually different from the fears found in nature depending on your specific life…