All these development practises originated in Smalltalk I believe. "Agile" software development itself was dreamt up by a bunch of (mostly) Smalltalkers. I hear

All these development practises originated in Smalltalk I believe. "Agile" software development itself was dreamt up by a bunch of (mostly) Smalltalkers. I heard once told that these practices were attempts at formalising/packaging and selling normal Smalltalk development practices.