There are many blacks in France. What are the reasons for this social phenomenon?

I have never been to France, studied a little history and read two books. Let's talk about this problem briefly.

Due to historical reasons, France is a colonial country. At that time, there were immigrants and refugees in some countries, which led to almost all countries in North Africa speaking French. Although some of them kept their own national languages, they all taught in French for education. In this way, blacks in North African countries can easily integrate into French society. With the application of some laws and regulations, some blacks will naturally become normal from countries with loose immigration to Europe and then to big cities.

For economic reasons, most of France's oil imports come from North African countries, and the French government has signed exchange agreements with most of these countries in exchange for oil. It also includes relaxing immigration policies to these countries in exchange for cheap oil and rations.

Welfare reasons, as we all know, in some developed countries, the social welfare system is relatively perfect and the treatment is not bad. Such as fertility, education, medical care, work, and old-age care. For example, in France, poor families have special discount cards for shopping. With children, there is a living allowance. The more children, the more subsidies. If you can't find a job or a good job, you will have children at home and eat subsidies. After a long time, the number of black people will naturally come up.

For policy reasons, although France is not an immigrant country, it still has an accepting and tolerant attitude towards immigrants. In fact, France's immigration and naturalization policies have always been relatively loose. In France, you can get French nationality if you work legally for three years, and you can get long-term residency if you work legally for five years. You don't have to give up your China nationality. In addition to working, you can be naturalized after five years of marriage. Moreover, if the child was born in France, the child 18 years old can get a French visa, and the parents of the child can also get a detention permit because of the child. So in this way, it is not difficult for black people to become full members in France.

One more thing, during World War II, Charles de Gaulle fought soldiers from three countries in North Africa. People in three countries in North Africa shed blood for France. Morally speaking, France thinks they owe it to the three North African countries. So France gave the black people a green light in all aspects of history and policy. Slowly, there will be more blacks.