Right livelihood means that one should abstain from making one’s living through a profession that brings harm to others, such as trading in arms and lethal weapons, intoxicating drinks or poisons, killing animals, cheating, etc., and should live by a profession which is honorable, blameless, and innocent of harm to others. One can clearly see here that Buddhism is strongly opposed to any kind of war, when it lays down that trade in arms and lethal weapons is an evil and unjust means of livelihood.
These three factors (right speech, right action, and right livelihood) of the eightfold path constitute ethical conduct. It should be realized that the Buddhist ethical and moral conduct aims at promoting a happy and harmonious life both for the individual and for society. This moral conduct is considered as the indispensable foundation for all higher spiritual attainments. No spiritual development is possible without this moral basis
