A better breakdown of economic waves / technological transitions comes from Robert Ayres, see his "Technological Transformations and Long Waves", February 1989:<p><a href="http://webarchive.iiasa.ac.at/Admin/PUB/Documents/RR-89-001.pdf" rel="nofollow">http://webarchive.iiasa.ac.at/Admin/PUB/Documents/RR-89-001....</a><p>Ayres defines <i>five</i> technological transformations. The period of most significant change came with the third, spanning roughly 1870-1890 (with further refinement of major inventions since). I'd argue that the rate of transformation has slowed since.<p>1. ~1775: cotton textiles, iron, and steam.<p>2. ~1825: railroads and steamships, telegraph.<p>3. 1870-1890: steel, coal-tar chemistry & dyes, petroleum, sewing machines & bicycles, internal combustion engines, electrical light & power, telephone, automobiles, photography & cinema.<p>4. 1930-1950: Petrochemicals, synthetics, plastics, pharmaceuticals, communications -- radio, TV, microwaves, solid-state electronics & computers, aircraft & transportation.<p>5. 1975-present: Ill-defined. Slowing innovation, growing economy, declining industrial activity in the US, growing prevalence of computers.<p>Note that Ayres was writing in 1989, immediately prior to the emergence of the Internet and World Wide Web. Though these have revolutionalized <i>information access</i> and communications, their overall influence on everyday life has been less profound.