This basic idea is old. It has been used in several books and movies over the last hundred years, but the philosophy is sound. The idea is to try to perform three kind acts per day. The three recipients of these kind acts must then strive to also perform at least three kind acts for three other people, therefore paying the debt forward to a third party.
If everyone took part in this simple practice, the world would be a better place. While this wouldn’t stop poverty, hunger, and wars overnight; it would help to make everyone’s day-to-day quality of living a little bit better. The long term affects of this practice could prove to be truly world changing. If kindness could become a cornerstone of society’s values around the world, maybe one day humanities problems could be solved through efficient coordination.