According to the "Green Book": "if the national spirit is stronger than the religious spirit, the struggle between different nations, which used to be united in one religion, is amplified, and each of those nations achieves independence, returning to the social structure that is characteristic of it." "A tribe is the same as a family, but one that has increased due to the increased growth of offspring, that is, the tribe is a big family. The Nation is a tribe, but a tribe that has grown as a result of increased offspring, i.e., a nation is a large tribe. The World is a nation but a nation divided into many nations as a result of population growth, i.e., the world is a great nation."