Why Can Humans Not Get Along With One Another?

It seems to be impossible for us to live amicably with each other    
The chief reason is that we do not have love in our hearts  
Most people only think about themselves and their families    
There really is no fellow feeling among mankind
Selfishness and haughtiness pervade the whole world    
Adults display a me-first attitude, likewise children
Everybody tries to outwit and outdo others to become the best    
 
Humans have neither patience nor understanding    
A lack of the ability to reason leads to strife and contestation    
We are intolerant of the idiosyncrasies of others
The ones with privilege oppress and dominate the lower classes    
Peace and unity cannot exist where there is injustice    
Men hate and kill one another because of politics and racism    
Discord and hostility between nations continue to arise    
 
Few people care about kindness and brotherly love    
We become enemies because we differ with each other on issues    
Varied religious beliefs cause a division in every society    
Sad to say, friendship is contingent on agreement
A social relation that is built on hypocrisy cannot stand    
We do to others the things we do not want them to do to us    
Some persons are to arrogant to treat others as equals    
Will humans ever be able to love one another with sincerity?