Slavery, StratificationAssociated Documents (1)Main AuthorPublished YearTitleDocument TypeNumber of HypothesesDe Leeuwe, J.1970Society system and sexual lifeArticle8More CiteRelated DocumentsMore By AuthorAssociated Hypotheses (3)Main AuthorPublished YearHypothesisSupportedVariables Tested De Leeuwe, J.1970"[Societies where productive forces are above the lowest level but with internal oppression absent] approve of extramarital heterosexual freedom for both sexes more often . . ." (17)Supported3More CiteRelated HypothesesMore By AuthorDe Leeuwe, J.1970"[Societies with productive forces above the lowest level and internal oppression absent] accept female extramarital heterosexual intercourse and reject male extramarital heterosexual intercourse more often and/or accept male . . . intercourse and . . . reject female intercourse less often" (17)Supported3More CiteRelated HypothesesMore By AuthorDe Leeuwe, J.1970Societies with higher subsistence level and slavery absent will achieve a higher score for moral acceptance of sexual freedom proportionally more often (19)Supported3More CiteRelated HypothesesMore By AuthorAssociated OCMssocial stratification