Compass
Number 0, without which No other inventions are possible.
The invention of the assembly line made mass production of the automobile possible without requiring specially trained workers.
People were living before each invention and continued to live after, so there is no invention that we CANNOT live without.
You failed to list the invention to consider.
a football field without the end zones
because the Wright Brothers invention taught people how to build planes without their invention we wouldn't have planes
different
Fire
Planes have made it faster to move from place to place and even made it possible to go to places across the oceans and seas quickly and without a boat.
The high-rise building was made feasible by two things- the low cost availability of structural steel framing, and the invention of the elevator. Without elevators, no one is going to want to live or work on the 35th floor of a building.
At this point, we don't know. Inventions build on the discoveries of the past. Modern computers could not have been invented without the previous invention of the microchip. The microchip could not have been invented without the previous invention of the transistor. The transistor could not have been invented without the previous invention of the vacuum tube. The vacuum tube could not have been invented without the previous invention of electricity. What will be invented between now and 2030? We need to know the answer to that question before we could even speculate on what will happen in 2030.
The development of the atomic bomb would not have been possible without the pioneering research of Albert Einstein, Robert Oppenheimer, and Enrico Fermi.