Is homosexuality born or influenced by the environment? What is the impact on all mankind? It is said that homosexuality is one of the reasons for the demise of Mayan civilization.

Homosexuality is born. First of all, the scientist in gay gene is an American geneticist, DeanHamer. When he studied gay groups, he found that if there are several homosexuals in a family, they often come from the matriarchal family. So he thinks that a gene on the X chromosome affects homosexual orientation. According to the X chromosome of gay brothers, he found that the top gene Xq28 determines homosexuality. . Later, several studies supported Hammer's conclusion, and the gay gene was also found on three other chromosomes.

Homosexuality can be said to be the evolutionary driving force of human progress. Specific reference can be made to kinship selection. It should be mentioned that homosexuality is very common and normal in the whole nature, not just in human society. I think there is a post about the history of homosexuality, which is very detailed. You can look for it. The success rate of homosexuality is very high. Many great men, such as Newton and Turing, are gay, which is recognized by Britain.

I strongly object that homosexuality is the cause of the destruction of Mayan civilization. That's ridiculous. Why don't they just say that dinosaurs were extinct and were destroyed by homosexuals? There is a disease called homophobia. Then, I found a passage on the Zhihu about the destruction of Mayan civilization.

(First of all, Mayan civilization has not died out: in Mexico's Yucatan Peninsula and some countries in Central America, there are still millions of Mayans who speak Mayan language and maintain a traditional way of life. So this question should be revised as "the reason for the decline of Mayan civilization". Secondly, the Mayan civilization had declined before the Spanish invasion, which was manifested in the decline of population, building level and quality of life. The main reason for this situation is that the scientific and technological level of Mayan civilization, especially the agricultural scientific and technological level (primitive agriculture in slash-and-burn stone age) lags behind the population growth several times, resulting in a serious shortage of living resources, which in turn leads to war. Third, the Spanish invasion also dealt a great blow to the Mayan civilization: Spain was at the level of development in the late Middle Ages in Europe, much more advanced than the Mayan civilization in the Stone Age, and the strong exclusiveness of Catholicism also prompted Spanish conquerors to have a strong tendency to destroy pagan civilization. Finally, Maya's traditional culture is self-contained, which has become a double-edged sword: on the one hand, Maya can still maintain its cultural tradition after hundreds of years of Spanish invasion; On the other hand, the Mayans struggled in the process of modernization and did not fully integrate into the modern civilized society of Mexico and Central America. Author: Wu Jianming link:/question/21553589/answer/19725286 Source: Zhihu. ) That's it.