Stirrup Thesis
hypothesis suggested by L. T. White in 1962 that feudalism in Europe developed due to the 8th-century introduction of the stirrup to cavalry
en-GB/ˈstɪɹəp θɛsɪs/
en-US/ˈstɝəp ˈθisɪs/
hypothesis suggested by L. T. White in 1962 that feudalism in Europe developed due to the 8th-century introduction of the stirrup to cavalry