text: In breaking down the pre-capitalist framework of society, capitalism thus broke not only barriers that impeded its progress but also flying buttresses that prevented its collapse. That process, impressive in its relentless necessity, was not merely a matter of removing institutional deadwood, but of removing partners of the capitalist stratum, symbiosis with whom was an essential element of the capitalist schema. [... T]he capitalist process in much the same way in which it destroyed the institutional framework of feudal society also undermines its own.
  Examples
  Schumpeter (1949) in one of his examples used "the railroadization of the Middle West as it was initiated by the Illinois Central." He wrote, "The Illinois Central not only meant very good business whilst it was built and whilst new cities were built around it and land was cultivated, but it spelled the death sentence for the [old] agriculture of the West."
  Companies that once revolutionized and dominated new industries – for example, Xerox in copiers or Polaroid in instant photography – have seen their profits fall and their dominance vanish as rivals launched improved designs or cut manufacturing costs. In technology, the cassette tape replaced the 8-track, only to be replaced in turn by the compact disc, which was undercut by downloads to MP3 players, which is now being usurped by web-based streaming services.  Companies that made money out of technology which eventually becomes obsolete do not necessarily adapt well to the business environment created by the new technologies.