This article suggests that Wilson's definition of sociobiology, which incorporates underlying principles of animal social behavior, can be applied to human bahvior. Specifically, Wilson's assertion that the major ecological conditions associated with monogamy in animal societies, is tested on human societies.

This study examines the theory that transvestism is a way for boys to escape the male role. Munroe and Munroe use male contribution to subsistence as a new measure of a "rigorous male role." Findings suggest an association between male predominance in subsistence and presence of transvestism.

This article investigates determinants of the couvade; the authors reexamine some of their earlier findings and also consider Broude’s (1988) response to their previous studies. Exclusive mother-infant sleeping arrangements, matrilocal residence, and “protest masculinity” (a concept suggested by Broude) were all found to be associated with the couvade. Father-salience in infancy, also suggested by Broude, was only marginally associated.

Authors hypothesize that grammatical sex gender may be related to social structural variables. Results support this hypothesis and suggest that the degree of sex bias in the social structure is associated with the relative frequency of masculine and feminine nouns in languages with sex gender.

This study examines whether language construction, specifically the number of consonant-vowel syllables, will be related to the environment and literacy of a society. Empirical analysis suggests that consonant-vowel syllables are more common in warmer climates and less common in written languages.

This study examines possible correlates of the couvade. Results suggest that matri-residence, mother-infant sleeping arrangements, and low male salience all are associated with the couvade.

This chapter discusses the predictors of the couvade and male circumcision ceremonies cross-culturally. New findings suggest relationships between these two variables and infant carrying practices, marital residence, and descent.

This study attempts to replicate earlier findings regarding transvestism using a larger sample and a different index of sex distinctions. It is asserted that societies that maximize sex distinctions will not have institutionalized male transvestism.

Munroe and Fought attempt to add new perspective to Ember and Ember's (2007) assertion that certain environmental features help to predict mean sonority levels in speech. This article discusses the other possible elements such as word length that might raise the level of communicative efficiency.

This article adds nuanced findings to the previous generalization that high sonority of the vowel explains its more frequent use in warmer climates. The authors find that “speakers in warm-climate languages make more use of the so-called “sonorant” consonants, that is, consonants with some of the qualities of vowels” (123).