Reading your post, I had the feeling that you want to believe 'A' about human nature even though you see 'B', but you really, really want 'A'.
The reason I used just A and B is because there are many things that you want, and the letters can be used for each desire in a similar circumstance.
The world is turning on an insustainable axis of greed (and eventually population as well). It will stay that way for quite some time, but it eventually has to implode...but no one will have the will and ability
to change it before it does.
In terms of losing hope - do you mean that you feel so powerless that your hope in your ability to change things is diminishing? Think then about your ability to change your life, and yours alone (or that of yours and your family)...what about your ability to influence that of your immediate friends? In other words, what is it that you can do in your immediate
sphere of influence?
I have plenty of thoughts relating to the distance people experience in society (as a generalisation), and on the need for compromise, etc...but at the end of the day, when given the plethora of things that are spiraling out of control, I think it better to focus on what we can
influence, and to go about making our immediate
world a better place.