The wheel invention
Sumerians developed 350 day calenders.
A good invention is something that is very useful and needed by the consumer. Advancements in older inventions are always useful as well.
He was a very successful mining engineer. He may have invented some new methods for handling mining difficulties. (He did not invent the Hoover vacuum.)
Because they were important
An invention is important due to its expressive creativity point and unique style of idea. An invention can be very useful once created or formed.
People needed transportation very quickly. Robert Folten was the inventor of the invention.
a very important invention being worked on at this time is the sex robot.
This is very much a matter of opinion. Arguably the wheel is the most important
If you have a cat, you can train it to be a hunter, and then after so long of gaining a higher hunting skill, the cat can capture ghosts. Or you can buy the invention table in Build & Buy mode and invent things until your invention skill is very high, making you able to invent the ghost zapper.
The most important invention of this century will be the discovery of the cure of HIV/AIDS. This disease has no cure and has claimed the lives of very many people.
If you have a cat, you can train it to be a hunter, and then after so long of gaining a higher hunting skill, the cat can capture ghosts. Or you can buy the invention table in Build & Buy mode and invent things until your invention skill is very high, making you able to invent the ghost zapper.
The Sumerians gave us food and writing.