It's a self centered world.People are just thinking about himself.While people in some part of the world dying in starvation at the same time some one it buying a yatch for billion dollar's.That amount of money could save thousands of people from dying.A lots of people is wasting a lot's of money for their pet and some where thousands of children have no food,education,shelter.But after doing all this is the person happy with his life,don't even think of that.Still there is unhappiness.If you want happiness help others,bring smile to others face i can guaranty that.That will be real happiness.