India's caste system, South Korea's chaebol, Mexican drug lords, slavery in Mauritania or COVID-19, which is the most difficult to eliminate?

The hardest thing is hard to say. The Indian caste system is barely the most difficult, but compared with the above four, the simplest thing is to eliminate COVID-19. Because of historical, environmental and other objective factors, the other four cancers can be said to be closely linked with other countries and deeply rooted. Take India for example, we have a history of 5,000 years, but India was colonized for 3,000 years. Under normal circumstances, there will be resistance when there is oppression, but India broke through the shackles of truth three thousand years ago, resulting in the combination of religious afterlife and caste system. The caste system is the distribution of good and evil retribution in the last life, and the religious afterlife newspaper is the explanation of this retribution, so the suffering in this life has become indifferent. In other words, suffering is because you were a bad person in your last life, and enjoying happiness is because you were a good person in your last life. Look at other people's explanations. Is there a more perfect ruling system than this? The dross of the capitalist high welfare rule model is gone. So, what is the terrible impact of such a terrible system that lasted for 3000 years? Elephants in Africa evolved into short ivory to avoid being killed for ivory. Until a few years ago, India's caste system was at least written into genetic material. It is better to eliminate the caste system than to eliminate the Indians. As for South Korea's chaebol? How many years has Samsung been established? Samsung, which was invested by South Korea in those years, is now in born to die, but it is mainly due to external factors such as the involvement of the United States. Koreans have a strong national identity. South Korea really wants to bring down Samsung, and it can't stand it. Mauritania itself is a tribal nation. As for Mexican drug dealers, it is entirely because the gap in the drug market in the United States is too large, and there is supply when there is demand. Even the Mexican leadership can't give up this profit to eliminate drug dealers.