With the development of science and technology and social progress, big data has attracted more and more attention. Geneticists are also trying to use big data to conduct more in-depth research on human genes, and we are likely to usher in a new era of gene big data. < / P > < p > using gene big data tools, a study from Iceland found that in the gene pool composed of more than 100000 Icelanders participating in the experiment, the “smart” gene is becoming less and less with the age of birth. Many people have expressed their worries. Does this mean that human beings will become more and more stupid in the future? < / P > < p > what is the scientific significance of this research based on gene big data? What changes will it bring to our lives? In addition to the rational function of graduate students, what are the potential benefits for social behavior and social science? < / P > < p > the so-called gene big data refers to a new method of gene research that can reveal the relationship between human genes (genetic information) and some apparent traits by sequencing genes one by one in a large number of population samples, and then analyzing the sequencing results by computer. To put it simply, it is to establish a huge gene pool, and then to screen out the gene sequences related to some apparent characteristics (such as height, blood pressure, years of education, etc.), so as to form a corresponding relationship between the two. < / P > < p > when using gene big data for research, the genome data of individuals is obtained by sequencing, and the apparent traits are obtained by questionnaire and measurement. For example, if you want to take height or blood pressure as an apparent trait, you need to first measure the relevant data of the subjects, enter them into the database one by one, and then combine with gene sequencing, we can get the probability that the height or blood pressure of people with certain genes is higher than the average value or the blood pressure is higher than the average value. In this way, we can screen out genes for hypertension, obesity and even cancer. < / P > < p > in recent years, scientists have gradually expanded their horizons from studying the impact of genes on physiological function to the impact on social behavior. Since 2017, a number of studies have analyzed the impact of genes on human educational achievements, and have also introduced genetic research into the new track of social science, and “smart” genes have also entered people’s attention. The human brain is the most complex organ. Most human behaviors, especially those related to learning, come from brain activities. Good academic performance, the ability to accept a longer period of school education, naturally to a certain extent, the brain has the corresponding ability. However, after studying the relationship between the brain and neural activity, scientists found that the formation and function of the brain and neural plasticity are affected by a variety of gene activities. < / P > < p > in 2017, an Icelandic study recruited 200000 Icelanders aged from under age to 80 years old as subjects and analyzed their genetic data. Using the years of schooling they received as a variable, the researchers analyzed the gene pool of the population using AI big data tools, and screened out hundreds of genes related to educational achievement (education level). It should be noted that the educational achievement in this study is only based on the years of schooling, without considering other factors. < / P > < p > in order to reflect the contribution of these genes to educational achievement, researchers have invented an evaluation system called “multiple gene points”. For example, there are 100 education related genes from A1 to A100, and each gene may have a different contribution to educational achievement. Scientists use mathematical methods to calculate these contributions, and define a comprehensive score, which is similar to the single subject score and total score of college entrance examination. < / P > < p > the researchers found that the average number of polygenic points obtained in the analysis has been declining slowly in the past 80 years, and the score of the elderly is higher than that of the young. This means that the proportion of “smart” genes related to school education is less and less in the subjects’ gene pool. The researchers’ explanation is that longer years of education are often behind a delay in the age of marriage and a decrease in the number of children born. As a result, the so-called “smart” genes are less likely to pass on to their offspring. However, it is still too hasty to claim that humans are slowly becoming stupid on this basis alone. Multi gene points is only a new evaluation method. Its scientificity and repeatability still need more and larger gene samples. Moreover, the evaluation index of social science is different from that of natural science. In many cases, it is not a simple concept of “black or white”. Therefore, to determine whether the “smart” gene is reduced, more in-depth research is needed in the future. < / P > < p > as mentioned above, this study seems to infer that humans will become more and more “stupid”, but it is not. First of all, although multiple gene points are an objective evaluation index, they can never be equated with “smart”. It just means that people with higher multiple gene points tend to receive longer school education. In addition, if expressed as a percentage, this tendency is comparable to other classical indicators for predicting education level (such as both parents have received college education, family wealth status, etc.). According to Icelandic data, having higher polygenic points only increases the likelihood of a longer period of schooling by more than a dozen percentage points. < / P > < p > secondly, although the sample size of this study is not small, there is still a lack of more extensive and representative genetic data, for example, almost all the subjects are European white. In fact, similar studies among African Americans do not see the same trend. < / P > < p > finally, if one of the so-called “smart” genes is taken out individually, the contribution to the final points is extremely small. It is not to say that having some “smart” genes will stand out in school education. In addition, the decline rate of the points in the study is actually extremely slow, and it is likely that the phenomenon of “stupid” of future generations will not appear in the future. The most important thing is that the development rate of human society enables our future generations to obtain information by more convenient means, so that they have more opportunities to receive higher education and learn in a more efficient way. These social development trends have brought about a tendency to promote learning far more than the loss of “smart” genes. Although this study has many shortcomings, at least it proves that gene big data can provide a new idea for gene research. In the past, scientists may need to knock out genes one by one by using genetic engineering technology, and then observe the changes of experimental objects in order to determine the physiological functions corresponding to these genes. However, gene big data method can easily screen out a series of related genes in a short time with the help of a certain characteristic index. < / P > < p > in addition, at present, people’s understanding of the impact of genetic big data on sociology is still relatively limited, but in the future, this new track is still of far-reaching significance. In addition to studying the impact of genes on education, the technology will also focus on other aspects of sociology, such as the impact of genes on personality traits and emotional changes, and whether there are genes for depression, anxiety and irritability. It is believed that in the future, gene big data research will gradually penetrate into every corner of the field of sociology, so that people can better understand themselves and their groups in an uncertain world, so as to better outline the future.