The Prince , Niccol Machiavelli's handbook on power--how to get it and how to keep it--has been enormously influential in the centuries since it was written, garnering a heady mixture of admiration, fear, and contempt. Its author, born to an established middle-class family, was no prince himself. Machiavelli (1469-1527) worked as a courtier and diplomat for the Republic of Florence and enjoyed some small fame in his time as the author of bawdy plays...