Niccolò Machiavelli (1469–1527) was an Italian Renaissance historian, politician, diplomat, philosopher, humanist, and writer, widely acknowledged as the founder of modern political science. He has often been called the father of modern political theory. Machiavelli was a secretary to the Second Chancery of the Republic of Florence when the Medici were out of power, but his career ended with their return to power. As a theorist, his key political work is 'The Prince' (Il Principe), written in 1513, in which he espouses the necessity for pragmatism and the value of craftiness in political leadership, implying that ends could justify the means. While 'How to Attract Success & Fortune: 30 Books from the Masters of Self-mastery' is not directly attributed to Machiavelli, it may aggregate the views of various classical writers on the subject of leadership and self-mastery. This could include referenced material derived from Machiavelli's oeuvre, considering his lasting influence on the discourse of power politics and human conduct. Noted for his sharp and analytical mind, Machiavelli's literary style was characterized by a clear and pragmatic exposition of the political realities of his time, imparting a legacy that extends far beyond his lifetime, influencing countless leaders, philosophers, and authors.