Social Environement and the STRESS!

What are the causes of stress? What doesn't cause stress may seem like the better question. Like this image to the left, we may feel that there is so much going on that our own head cannot simply contain all of it. But what is it specifically that causes all these troubling thoughts? Was it something that we were born with? Or perhaps it was the environment we were raised in? There were and there still remain many influences which may cause any individual to feel that there is simply too much to handle. Life should be made simpler, no? We have enough already with our own lives, be it financial, social, mental, physical, the list goes on forever! So why can't we eliminate the problems we feel to be unnecessary? Is there really a valid reason to say that I deserve to have less stress than others? Or should we to learn how to better handle and cope with the stress?