What is the most important invention in history ?

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Francisco Javier Sanchez Careaga

The Printing Press. Information passing from one person to another person faster and cheaper.

Mohammed R Ahmed

The Battery! The concepts of storing power and making it portable to use paved the way to greatly accelerating human progress. Thanks.

Ali Ramadhan

Hai Mr. Najib.

I Think the most important invention was. The cave painting. Because, it's a pioneer in many things. It can be make some story or some information that useful for period after.

Regards

Najib Abou Karaki

Dear Ali, very original indeed. Thank you.