Ключевые слова: block, class, classification, community, competition, concept, conflict, cube, difference, differential, economic, female, gap, group, high, income, inequality, low, lower, male, man, men, miniature, people, person, poor, poverty, power, pyramid, rank, relationship, rich, sitting, social, social stratification, stairs, stratification, stratum, structure, success, unequal, unfair, upper, wealth, woman, women, wood, wooden,