100 years? First, how 'bout 100 years ago, i.e., back to 1923? Telephone: By 1915 in the US we had long distance telephone coast to coast. Cars: The cars of

100 years? First, how 'bout 100 years ago, i.e., back to 1923? Telephone: By 1915 in the US we had long distance telephone coast to coast. Cars: The cars of 1923 were not so bad -- had tops, doors, glass windows, electric lights, rubber tires filled with air, a rear axle differential, .... https://en.wikipedia.org/wiki/Category:Cars_introduced_in_1923 https://en.wikipedia.org/wiki/Category:Cars_introduced_in_19... Airplanes: The Wright Brothers were at Kitty Hawk in 1915, and airplanes were important in WWI. https://en.wikipedia.org/wiki/Kitty_Hawk https://en.wikipedia.org/wiki/Kitty_Hawk Physics: By 1923 we had explained the photoelectric effect (one of the foundations of quantum mechanics) and both special and general relativity (1915), https://en.wikipedia.org/wiki/General_relativity https://en.wikipedia.org/wiki/General_relativity The Schrödinger equation was on the way, published in 1926, https://en.wikipedia.org/wiki/Schr%C3%B6dinger_equation https://en.wikipedia.org/wiki/Schr%C3%B6dinger_equation From the past, one possible lesson is that progress is enabled or constrained by fundamentals. So for the next 100 years, what are some of the likely important fundamentals?