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I’ve always thought that the schoolboy who’s a bit of a troublemaker is the one who’s going to come out and do something really interesting.

The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

He was a man who had always been too proud to ask for help, and now he was too proud to accept it.

Climate change is the greatest threat to global forests, but also our greatest opportunity for innovation.