We are all in search of it, and while some have it, many don't. The pursuit of it was even written into the American Declaration of Independence. We're talking about happiness, surely an ancient and universal human desire, a desire that arose in our brains when we arose on the Ethiopian savanna. But what is it? And more importantly, how do we get it?

Happiness is many things to many people. Psychologists and sociologists have spent plenty of time studying happiness, and have come up with all sorts of theories.

Surely money must help us achieve happiness -- or what are we all doing working so hard? But many surveys agree that despite our total immersion in the culture of materialism (and the pleasure that retail therapy can bring) more money doesn't make you happier.