These industrial revolutions are coming faster and faster, and somehow feel less transformative with each unveiling. I only know arguably two. I have no idea what the third, let alone the fourth was.
First: powered tools, mechanised factories, basic but modern chemical processes.
Second: mass production, interchangeable parts, reliable steel, telegraph and other basic uses of electricity.
Third: computers and everything related to them.
Fourth: all the buzzwords and not much substantial at this time — though when the dust settles, I won't be surprised if at least a few currently popular things are still seen as relevant and not merely flash-in-the-pan cultural artefacts like the 18th Amendment, patent medicine, or Spiritualism.
Second: mass production, interchangeable parts, reliable steel, telegraph and other basic uses of electricity.
Third: computers and everything related to them.
Fourth: all the buzzwords and not much substantial at this time — though when the dust settles, I won't be surprised if at least a few currently popular things are still seen as relevant and not merely flash-in-the-pan cultural artefacts like the 18th Amendment, patent medicine, or Spiritualism.