We can feel the same

Whenever I watch an animal rescue movie, I feel happy and relieved, all of the animals in help have the same face, sad and worried.
And the surrounding people give the workers applause after the affair, the scenery are the same, me too. 
So, we can feel the same all over the world, no?
In stead of the fact, discrimination, war and starvation exist actually on the part of the Earth, I don't know why?
The logistics capability is well developed all over the world now.
What are the differences between us? The appearances, color of the skins,  the prevailing word distinctly or specific manners and customs?
What makes us anger and in aggressive mental condition?
Differences of religion, politics and the power of Military do that?
Or our innate eager for the better lives?
Then should we make effort to obtain more and more?
Why don't we stop it if we are satisfy it in minimum condition?
Why do we spend our limited and precious time period only for earning money and pay debts?
As my own opinion, we should enjoy now, yetzt enough not for future nor the passed, we should not live for earning money.