Abstract: In this theoretical article, the authors turn to the analysis of studies explaining the origin and revealing the functions and meaning of human oral speech within the framework of an evolutionary approach. First of all, the authors are interested in the influence of sexual selection on the development of verbal skills in different age and gender groups. In this regard, the data of the history of the human life cycle are of particular interest, which indicate that the mastery of language as a tool for influencing and manipulating the opinions of others approaches an advanced level of proficiency only at the time of puberty, and speech, thus, begins to play an important role in intersex competition. Rapidly developing with the onset of puberty, the ability to performative vivid performances, to defend their position, as well as to conduct debates in public, apparently, can be guided by the forces of sexual selection, and therefore, they should manifest themselves more clearly in men than in women. It is assumed that verbal mastery can serve as a means of actively attracting attention for the purpose of self-promotion and improving the social status of the speaker. The methodological basis of our work was largely the analysis of ethnographic sources. In the article, the authors cite extensive ethnographic material confirming the connection of high social status with oratorical abilities. The authors also turn to the latest research that analyzes the differences in performative speech between men and women. Experimental work shows that in a conversation with an attractive woman, men tend to be more creative in choosing words and expressions. Some researches consider the connection of various aspects of speech with the attractiveness of the speaker, his masculinity and adaptability. Of great interest are studies studying the relationship between musical abilities and attractiveness, as well as works analyzing the articulatory features of oral speech and their connection with belonging to a certain social environment or social class. All the features of speech given in the review could most likely have been formed by the pressure of the forces of sexual selection. In this regard, the study of sexual dimorphism seems to be one of the most important directions in the research of performative speech.

Abstract: The key goals of this research consists in assessment and comparative analysis of the help of family in large postindustrial societies. For this purpose, the author carries out a cross-cultural comparative study of the frequency of family contacts in the three countries: Russia, the United States, and Brazil. Based on the 2019 online survey, the author collected quantitative data on the involvement of grandparents into upbringing process of their grandchildren in Russia (N=620), USA (N=308) and Brazil (N=603). In addition to the basic biosocial demographic parameters, the survey included two target questions on the frequency of communication between grandparents and grandchildren. Intensive migration processes and the resulting distance of households between the two generations in the indicated countries substantially reduces the traditional help of grandparents in upbringing the younger generation. The acquired data demonstrate the significant differences that take place in these three countries, and their correlation with the peculiarities of the family lifestyle in other countries. For example, the help of grandparents in Brazil is much lower than in Russia. Comprehensive analysis is also conducted on the factors that reduce the involvement of grandparents in upbringing of their grandchildren in Brazil. The decrease in the frequency of family contacts may be associated with the intensive urbanization processes unfolding in Brazil over the few recent decades. At the same time, the acquired data may reflect the in-depth processes of feminization of migration from less developed regions of the world to more economically prosperous countries. The analysis of the observed consequences of accelerated urbanization in Brazil is of applied importance for understanding the future prospects for the development of modern family.

Abstract: This article presents a brief overview of the modern concept of gender selection and theory of parental investments, according to which the ration of genders in society manifests as a key forecaster of the level of polygyny on the marital market. The theory predicts that in shifting of the models of marital behavior from monogamous and polygamous, the level of matrimonial investment can decrease. The authors suggest that such targeted decrease of resources in the regions with low coefficient of genders can exert negative impact on the economic parameters of household in these regions. This research provides quantitative assessment of subjective satisfaction with financial position of the members of households in populated areas (N=10385) with various levels of coefficient of genders. The statistical analysis was conducted using the IBM SPSS software with application of the following methods: Pearson's χ2 criterion, Goodman and Kruskal's gamma (γ) criterion, and dispersion analysis. The acquired results confirm the presence of positive interconnection between the level of coefficient of genders in the region and financial wellbeing households. It was determined that in the regions of the Russian Federation with equal ration of male and female population, as well as in regions with predominant male population, the subjective assessment of own financial wellbeing was higher among both, men and women. The factor of sustained imbalance in the ratio of genders represents one of the relevant questions of Russian demography, but this phenomenon is rarely taken into consideration in quantitative research within social sciences.