I think about the time we live in, and how glorious and sad it is. The world is falling apart and coming together simultaneously, but that's the nature of a time of change and upheaval. Tyrant v Pleb. Old v New. Here is a list of major word-shaking moments I can think of:

Revolutions

  1. Literature for the people (Gutenberg 1440)
  2. Religion for the people (Reformation 1517)
  3. Government for the people (Philadelphia 1776)
  4. Travel for the people (Ford 1908)
  5. Media for the people (the blogosphere 1999, iPhone 2007)
  6. Money for the people (Nakamoto 2009)
You've experienced two significant revolutions in your lifetime! What's next to fall?
In your list, probably the inventions of the barbed wire, and the telegraph would be two more that are less considered revolutions, but their impacts were nothing but revolutionary.
And along those lines, I suppose one or more of these would be in the same category as well:
Four Pillars of Civilization: cement, steel, plastics, and ammonia
Smil’s assessment of the importance of ammonia is staggering.
“In 2020, nearly 4 billion people would not have been alive without synthetic ammonia…. the Haber-Bosch synthesis of ammonia [is] perhaps the most momentous technical advance in history.”
As far as what is next? I think these things are only understood to be revolutionary after the revolution occurs. Nobody knew that the utility of the iPhone would eventually disrupt the entire taxi industry globally, for example.
reply
Food for the people (2023) when next year someone invents the machine that materializes food in an instant
reply
Funny, but the trend of people raising chickens and gardening is real
reply