It will be remembered that Buddhism came to China overland and by sea in the Han epoch. The missionary monks who came from abroad with the foreign merchants found little approval among the Chinese gentry. They were regarded as second-rate persons belonging, according to Chinese notions, to an inferior social class. Thus the monks had to turn to the middle and lower classes in China. Among these they found widespread acceptance, not of their profound philosophic ideas, but of their doctrine of the after life. This doctrine was in a certain sense revolutionary: it declared that all the high officials and superiors who treated the people so unjustly and who so exploited them, would in their next reincarnation be born in poor circumstances or into inferior rank and would have to suffer punishment for all their ill deeds. The poor who had to suffer undeserved evils would be born in their next life into high rank and would have a good time. This doctrine brought a ray of light, a promise, to the country people who had suffered so much since the later Han period of the second century A.D. Their situation remained unaltered down to the fourth century; and under their alien rulers the Chinese country population became Buddhist. The merchants made use of the Buddhist monasteries as banks and warehouses. Thus they, too, were well inclined towards Buddhism and gave money and land for its temples. The temples were able to settle peasants on this land as their tenants. In those times a temple was a more reliable landlord than an individual alien, and the poorer peasants readily became temple tenants; this increased their inclination towards Buddhism. The Indian, Sogdian, and Turkestani monks were readily allowed to settle by the alien rulers of China, who had no national prejudice against other aliens. The monks were educated men and brought some useful knowledge from abroad. Educated Chinese were scarcely to be found, for the gentry retired to their estates, which they protected as well as they could from their alien ruler. So long as the gentry had no prospect of regaining control of the threads of political life that extended throughout China, they were not prepared to provide a class of officials and scholars for the anti-Confucian foreigners, who showed interest only in fighting and trading. Thus educated persons were needed at the courts of the alien rulers, and Buddhists were therefore engaged. These foreign Buddhists had all the important Buddhist writings translated into Chinese, and so made use of their influence at court for religious propaganda.