As a result, I chose, as I now correctly understand, the problem of restoring the history of populations according to their modern genetic makeup. I was busy with this task for a total of about two years and in the end, as early as 2009, I realized that what I had invented was useless. In my life, for now, this was probably the biggest scientific failure. A lot of work was invested in the project, which completely failed. However, some benefits, however, were: I learned a lot from the theory of probability, which I did not know well, and I also learned a lot about demography and demographic history.