The starting point for many analyses of European state development is the historical fragmentation territorial authority. dominant bellicist explanation formation argues that this was an unintended consequence imperial collapse, and warfare in early modern era overcame by winnowing out small polities consolidating strong states. Using new data on papal conflict religious institutions, I show in...

In 1912, 68 medieval crania were excavated from a cave at Safed in the eastern Mediterranean and brought to the United Kingdom. It is only recently that these skulls have been studied for evidence of disease. One adult individual demonstrates multiple lesions of the cranial vault, compatible with treponematosis. Radiocarbon dating suggests the year of death to be between 1290-1420 AD. This rang...

Humans are not ants, but we often trudge together along the same trail, neglecting to look around for alternatives. Mass delusions involve large groups holding false or exaggerated beliefs for sustained periods. Humanity has a long, sorry list of these shadow-the-leader epidemics of collective consciousness which appear obviously wrong only in hindsight. Some last for centuries: early alchemist...