This article evaluates a thesis containing three interconnected propositions. First, romantic
love is a “commitment device” for motivating pair-bonding in humans. Second, pair-bonding …

Integration and modularity refer to the patterns and processes of trait interaction and
independence. Both terms have complex histories with respect to both conceptualization …

The fossil record of the human pelvis reveals the selective priorities acting on hominin
anatomy at different points in our evolutionary history, during which mechanical …

The term 'obstetrical dilemma'was coined by Washburn in 1960 to describe the trade‐off
between selection for a larger birth canal, permitting successful passage of a big‐brained …

The human birth canal shows a tight fit with the size of the neonate, which can lead to
obstetric complications. This is not the case in other apes, and has been explained as the …

The shape of the human female pelvis is thought to reflect an evolutionary trade-off between
two competing demands: a pelvis wide enough to permit the birth of large-brained infants …

Compared with other primates, childbirth is remarkably difficult in humans because the head
of a human neonate is large relative to the birth-relevant dimensions of the maternal pelvis. It …

Sexual dimorphism in the human pelvis has evolved in response to several jointly acting
selection regimes that result from the pelvis' multiple roles in locomotion and childbirth …

If genetic constraints are important, then rates and direction of evolution should be related to
trait evolvability. Here we use recently developed measures of evolvability to test the genetic …

The pelvis is an anatomically complex and functionally informative bone that contributes
directly to both human locomotion and obstetrics. Because of the pelvis' important role in …