People are inclined to offer yajna because unless sacrifices are offered there will be insufficient rain (yajnad bhavati parjanyah [Bg. 3.14]), which will hamper agricultural activities (parjanyad anna-sambhavah). By introducing brahminical culture, therefore, a ksatriya government should engage people in performing yajna, studying the Vedas and giving charity. Thus the people will receive their necessities for life very easily, and there will be no disturbances in society. In this regard, Lord Krsna says in Bhagavad-gita (3.12):

The demigods are authorized supplying agents who act on behalf of the Supreme Personality of Godhead, Visnu. Therefore, they must be satisfied by the performance of prescribed yajnas. In the Vedas, there are different kinds of yajnas prescribed for different kinds of demigods, but all are ultimately offered to the Supreme Personality of Godhead. For one who cannot understand what the Personality of Godhead is, sacrifice to the demigods is recommended. According to the different material qualities of the persons concerned, different types of yajnas are recommended in the Vedas. Worship of different demigods is also on the same basisnamely, according to different qualities. For example, the meat-eaters are recommended to worship the goddess Kali, the ghastly form of material nature, and before the goddess the sacrifice of animals is recommended. But for those in the mode of goodness, the transcendental worship of Visnu is recommended. Ultimately, all yajnas are meant for gradual promotion to the transcendental position. For ordinary men, at least five yajnas, known as panca-mahayajna, are necessary.

One should know, however, that all the necessities of life that human society requires are supplied by the demigod agents of the Lord. No one can manufacture anything. Consider, for example, all the eatables of human society. These eatables include grains, fruits, vegetables, milk and sugar for persons in the mode of goodness, and also eatables for the nonvegetarians, such as meats, none of which can be manufactured by men. Then again, take for example, heat, light, water and air, which are also necessities of lifenone of them can be manufactured by human society. Without the Supreme Lord, there can be no profuse sunlight, moonlight, rainfall or breeze, without which no one can live. Obviously, our life is dependent on supplies from the Lord. Even for our manufacturing enterprises, we require so many raw materials like metal, sulphur, mercury, manganese and so many essentialsall of which are supplied by the agents of the Lord, with the purpose that we should make proper use of them to keep ourselves fit and healthy for the purpose of self-realization, leading to the ultimate goal of life, namely, liberation from the material struggle for existence. This aim of life is attained by performance of yajnas. If we forget the purpose of human life and simply take supplies from the agents of the Lord for sense gratification and become more and more entangled in material existence, which is not the purpose of creation, certainly we become thieves, and therefore we are punished by the laws of material nature. A society of thieves can never be happy, for they have no aim in life. The gross materialist thieves have no ultimate goal of life. They are simply directed to sense gratification; nor do they have knowledge of how to perform yajnas. Lord Caitanya, however, inaugurated the easiest performance of yajna, namely the sankirtana-yajna, which can be performed by anyone in the world who accepts the principles of Krsna consciousness.

Hiranyakasipu planned to kill the inhabitants of earth so that yajna would stop and the demigods, being disturbed, would die automatically when Lord Visnu, the yajnesvara, was killed. These were the demoniac plans of Hiranyakasipu, who was expert in such activities.