Abstract Family systems shape social institutions, yet they are rarely considered in histories of economic development. In this article, we show that a suite conventions—such as age gaps at marriage, bride price, sequestration, and discrimination violence against women—are overrepresented polygamous societies compared to monogamous societies. This dichotomy can be explained on the grounds polyg...

Sixty tilted discs were studied by colour photography, including some by fluorescein angiography. Attention was drawn to the contracted, D-shaped outline of the scleral canal, and it was suggested that fewer fibres than normal enter the defective side of the disc. This was supported by examination of the nerve fibre layer and the discovery of field defects in 13 of the 27 eyes in which the visu...