I can't decide if it's better to call it a seesaw or a teeter-tonder.

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For all of the power that leverage brings, seesaw and teeter-tonder are pretty ridiculous names.

These are bits of playground equipment that enable a leveling out to happen.

Sitting in the right spot, a 60-pound kid can move a 300-pound behemoth with no trouble whatsoever.

Leverage is at the cornerstone of modern culture.

700 years ago, if you wrote a book, only one person could read it at a time.

Libraries were reserved for the very wealthy and for monarchs and nobody else had books at all.

And if you wrote a book that you wanted to evangelize, you would put scribes together

and they could make copies of your book one at a time. But again, those handmade copies could only

be read by one person. One scribe writing one book, read by one person at a time.

Gutenberg's innovation, movable type, which would have come along with or without him,

was that you could print hundreds or thousands or tens of thousands of books,

and suddenly one author could reach a lot of people all at once. That Martin Luther

translating the Bible into German almost burned down all of Europe. Because suddenly,

...