No. 1: The Knife

Forbes ranked the "2o Most Important Tools" recently, and the knife topped the charts.

Forbes.com readers, editors and a panel of experts rank the knife as the most important tool of all time, in terms of its impact on human civilization.

The knife is one of the most ancient tools in our arsenal, in use for more than 2 million years, longer than modern humans have walked the Earth. It's evolved alongside us, changing form to meet our needs and demands. Knives help feed us, shelter us, defend us and assure our survival. It's the most reliable, useful and important tool in human history.

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Cheers.