Have you ever thought that what is the most vital thing for us?

I mean what is worthiest thing for us to live?
At first I was searching it in things like food, accommodation, civilization,… but finally I found it in different environment. I realized that food , accommodation, and needs like these can finally eliminate a person or a group of people and every thing will be finished. But instances like disappointment can deprave lives of several generation. Unfortunately I have felt this myself. People of my country had have chronic disappointment for centuries. These people trick themselves with memorials of hundreds and sometimes thousands years ago . they have lost their aplomb for some reasons and now it is very very difficult to restore them. most of them have a wretched life until death and only transfer it to next generation. Only a few of them can change their fate with scramble. When a person wants to change the situation they only say that he cannot succeed. They don’t incorporate in rehabilitating the country.
Any way I want to say that in my opinion the most important thing in life is “hope”Surely you can’t find anyone alive Without hope, albeit there are many things that are necessary for living but as I said before a few of them have as long lasting impacts as several generation and the most long lasting impact is from disappointment.