Why do not we live like paradise on earth?

I see that the world has not yet reached a culture equal to the meaning of man , As long as there is fighting even at the level of one individual then there is an incomplete culture
The happier the world is , the greater the culture , we all know that psychological comfort is linked to happiness , The hunt of people's felling is one of the main reasons for making enmity between people,in other words , if people do not hunt each other by words or actions
How so?

is to excuse one another for all that man has
The strong excuse the weak ... but why?
Because force is just a ratio between an individual and the last meaning that the person "X" is stronger than the person "y", there is someone who is stronger than "x"
The rich excuses the poor .... The beautiful excuses the ugly ... Christian excuses the Muslim ... Any person from any nation excuses any person of any nationality .... We are all born in a place and time imposed on us what we are now
Do not hurt each other, never speak or effectively and do not mock each other
And that this culture starts from the children to get to a better level than the current world level of events
The world did not live as low as it should have been able to live much better
Although we have minds and we have possibilities, but unfortunately we are fed that money is a pleasure
Yes money is important but we thought too much

When a person does not feel that there is a difference between him and others, the world will be more beautiful
The weak shall not see that the strong is stronger than him, and the ugly shall not be seen;
Yes the word has a great role in addressing the souls
We can live a paradise on earth where there is no destruction

So far, man has evolved with technologia but with the general culture of a certain level that has not reached him yet
Racism, discrimination, arrogance, selfishness are unfortunately many that make people laugh in many situations
It would not have been selfish to help the poor rich not to give money but to make projects that help people or to elect people according to our peril

Or not only interest is standard
And live only for ourselves because we can not live without people
People need each other