The quarter of the population of France has at least one grandfather or the grandmother from among immigrants. And, nevertheless, the migratory balance in the mother country, counted up by experts INSEE, remains moderated: only 1,5 % (we will remind that 1 % is a 60 thousand migrants on 60 million inhabitants). Even if we will decide to double this figure and we will finish it to 3 % (that will be essential updating), all the same France remains in the bottom part European tables: Great Britain comes back to the of 5 % after recent flow of half-million workers from the countries which have filled up with EU, Italy has already broken a barrier in 10 %, and Spain... In 15 %! It is necessary to understand that it is not so obligatory to have massive immigration that the population structure has essentially changed. For this purpose enough small by quantity, but "the injection" of new migrants supported by such powerful "amalgamator" as marriages with foreigners proceeding within decades. Now half of all children of immigrants are natives of the mixed families.