nothing
Eli Whitney's cotton gin. No doubt about it.
laptop portability is the most important invention
the most important invention was the plow
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While GPS is helpful it is not the most important invention of all time. Some would say computers are the most important invention of all time. However what powers both of these things? Electricity seems to be the most important invention of all time.
Cotton
The most important invention in world war 2 was the atomic bomb.
Cotton
Cotton
The most important invention of the Sumerian's was Irrigation. Irrigation is how the Sumerian's led their water through pipes, etc.
The most important invention was gunpowder
1. the invention of computers 2. the invention of human kind 3. the invention of inventing!