When the Buddha taught, he said that achieving enlightenment is due entirely to receiving correct teachings and then on how diligently one implements these teachings. One may ask, how does this whole phenomenal world work? The Buddha taught that it all follows the process of interdependent origination in which one action or event causes another event, which causes another event and so on. In personal terms interdependent origination explains how our happiness and suffering in our present life is the result of actions in our previous lives. This process proceeds through twelve links and each of these links or phases is explained in detail in this book.