Introduction. The postulate of integration and social inclusion of people possessing somehow migrational backgrounds remains a fundamental issue for our nowadays society. On one hand, there is a totally favorable background to create multiculturalism and diversity in the particularly European community. On the other hand, once we analyze individual situations, especially ones, which take place in the international families, we will predominantly see a completely opposite tendency i.e. to maximally assimilate the way their child will be raised and educated. Thus, these are exactly parents possessing migrational backgrounds, who do want to “limit” their child from being “international” by claiming that this attitude will help them to protect a necessary identity for future integration and social inclusion. In the reality, however, the tendency of international families to raise/educate monocultural children may lead to disruption of social, societal, economical and educational wellbeing of the offsprings, as well as will rather than not lead to development of the antisocial personality disorder. Materials and methods. Naturalistic observation, case studies, survey/self-report data, analysis, synthesis, induction, deduction. In the frame of our cooperation and voluntary activity at the DAR for peace and equality (non-formal international group, based in Milan, Italy), we have analyzed the results of anonymous survey, which was led by us within the group of 73 people, from 18 to 43 years old, who are representatives of generation of locals “with migrational background” (the third migrational generation). The main characteristic feature of this social group is that they were born in so-called “international families” i.e. families, where one of the parents possesses either direct or indirect migrational background. Primarily, to assess the probability of declining of the appropriate (“desirable”) level of integration and social inclusion in the aforementioned individuals, we have assessed the gender and age balance between analyzed persons. Thus, there were 73 people, namely: 41 women and 32 men with the age range from 18 to 43 years old. The average age of persons in the group reached the index of 30,1 years old. Digital data were processed by using the method of variation statistic with calculating of the arithmetic mean (M), standard deviation (δ), the average error difference (m), the difference probability (p). The last data between two average in small samples was determined according to the Student’s table in compliance of condition (n1+n2-2). In determining of the probability level it was admitted an accuracy of p<0.05. Results. As a result, we have assessed a probability of development of the antisocial personality disorder in this social group, as well as possible reasons for the development of the analyzed condition. The probability of the APD development in the analyzed social group is tightly connected with the way these people (former children, who were born in international families) were grown and educated. Especially, if the multicultural families are forcibly rendered “monocultural” because of the “desire” of one of the parents, or mutual one. Neither of the expected scenarios of “assimilation” appear to be successful to make the process of the child’s integration and social inclusion appropriate, adequate and positive. In over 90% of cases, children who were forcibly rendered “monocultural” despite having international family, experience APD of various types, severe depression, tendency to migrational nomadism and migrational vacuum. Their condition may be however relieved through healing amnesia phenomenon, as it was numerously postulated in our former article within the framework research. Discussion. The tendency to forcibly render multicultural families monocultural is tightly connected with dominating prejudices, biases, fears, expectations and stereotypes regarding the community of migrants, refugees and forcibly displaced persons. They are socially “supposed to be different”, The difference may noticeably aggravate every pattern of their existence. Thus, the parents of such children are tended to refuse to “share their migrational background” with their child and try to make him/her “assimilate” from the very young age. However, it is exactly the forcible assimilation, which may lead to development of the antisocial personality disorder, migrational nomadism and migrational vacuum in case of the representatives of the third generation. Thus, the postulates of “desirable” diversity and multiculturalism, which are accepted and tolerated not exclusively within the legal framework, but also in societal realities will definitely lead to optimizing the general pattern of integration and social inclusion of persons, who possess migrational background; will decrease the index of probability of APD development in the similar cases, as well as will eliminate a typical tendency to “waste human potential” regarding “newcomers”.