According to a recent Harvard research study on "Happiness", it found out that the most important factor to happiness is not about "being rich" or "be famous" like most people think about. At the end of day, the ultimate key to happiness is -- "having good relationship", be it with family, friend or community. Why's that? 1/ Loneliness kill - as found in the research result. Be it rich or poor people, at the low time and lonely at older age, without any support or caring f