I think I am starting to get what you are saying.

Basically, in a society, we (society)creates the very dependance that leads to ideation of mortality.

Which, in a way, is true. But as you also say, humans as a species ARE dependant in nature, it is the way we are structured. We are made to associate in groups, to have company, to fall in love - from an evolutionary standpoint all of these things are now inherent in humans. When you take away one of these things we are dependant on, the survivalist in us has less to strive for, therefore making us unhappy.

If this is what you meant, then I get where you are coming from.