People have only one problem — the problem of clinging. Just because of this one thing people will kill each other. All problems, be they individual, family, or social, arise from this one root. Nobody wins; they kill each other but in the end no one gets anything. Gain and loss, praise and criticism, status and loss of status, happiness and suffering — these are the worldly dhammas.
— Ajahn Chah, Food for the Heart