This is because the population growth rate in Russia has shown a negative trend. So the Russian government is trying to promote population growth by lowering the legal age of marriage. Because Russia's economy has been in a very weak state over the years, many families simply cannot afford to raise children, which is why many young people choose not to get married or have children. But this also brings a very big problem to Russian society as a whole, first of all, the problem of military supply, if there is no large number of young people, will make the Russian military supply a very serious situation.
There is also the fact that a large number of young laborers are necessary for the development of society. The lack of young laborers due to the decline of the population is a major constraint on the development of some economic enterprises. Once this happens, it will make some economic enterprises have difficulties in operation, or even close down and go bankrupt. This will lead to a chain reaction of social problems as employees lose their jobs when these enterprises go bankrupt.
That's why the Russian government has chosen to lower the legal age of marriage to stimulate population growth. But we all know that the problem with Russia's declining population is not because of the legal age, but because of the economic recession. These years, due to the U.S. sanctions, the Russian economy has experienced a significant recession. The standard of living of the Russian people has also been a big problem, which has led to a lot of Russian people not choosing to have children at all. Because even their own standard of living can not be guaranteed, let alone raising children.
So if Russia wants to solve the problem of depopulation it must solve the economic problem, because the economic problem is the root cause of depopulation. But right now Russia is simply not capable of solving the economic problem.