Great Political Thinkers is actually a compilation of 4 distinct sections, representing 4 great political philosophers: Niccolo Machiavelli, Thomas Hobbes, John Stuart Mill, and Karl Marx. So far I've read the sections on Machiavelli and Hobbes.
Machiavelli is an oft caracatured figure in pop culture and even among major political figures and intellectuals. Few people actually care to examine the complexity and genius of his work. Machiavelli was once of the first political philosophers to examine the reality of political relations. Machiavelli was educated in the humanist tradition; and his colleagues continued in this vein of thought while Machiavelli made his breakthroughs. Humanists in the rennaissance exhaulted a set of civic virtues, often those articulated by the Roman statesman Cicero, such as honesty, moderation, patriotism, and liberality. Machiavelli realized that this idealized view of politics was fatally incomplete, and in his The Prince he examined the darker side of human nature. Machiavelli celibrated a authoritative leader who utilized a purely rational decision making process and bold, aggressive action to achieve his goals. His dismissal of conventional morals, even permitting a virtuous prince reason to tell falsehoods to his people and use fierce brutality, shocked his contemporaries. Yet Machiavelli was merely describing the world as it was, in my opinion. Those who ignored what he said were either hypocritical or swallowed up by others willing to subsume the means to the ends.
Machiavelli, in fact, is revealed by his later work as a firm proponent of republican values. Yet he existed in a time whenever his native Italy was broken up into countless city-states and was plagued by the Pope and French and Spanish invaders. In his opinion, only a strong Prince could unite Italy and rid it of the "barbarians." Only then could an ideal and free republic be established.