The Definition of Happiness

So I've decided something...there are many ways that people attempt to find happiness in this world. Everybody knows that.
And what seems appealing to one person may not seem appealing to another. Another basic fact.
But what about a true definition of happiness that fits all people? Which people are truly happy in this world because of one common theme?
With a world that strives on developing technologies, ideas, and medicine, there are many options from which a person may choose their "joy", and there will be many more tomorrow. But most people in the world share very similar problems and stresses and anxieties. Many illnesses cannot be cured. Many people cannot be calmed or compensated or helped to cope from certain trials in any way.
And with the developing fields of study and medicines being discovered, many people are rushing to the doctor and pharmacist to find these cures. Which is great. I personally love a world where I can find almost any type of relief I need from almost anything. But the sad thing is, besides the fact that, due to opposition in all things, many people abuse these drugs, there are also not cures for everything.
And so...after thinking, I know who the truly happy people in this world are...
Those lucky enough to have pills for their specific problems.