Harvey Mansfield posits that Machiavelli’s focus on the actual outcome or 'effectual truth' of an action, rather than its stated intent, laid the groundwork for the fact-based, cause-and-effect reasoning central to modern science.

A leader's controversial actions are judged solely on their final outcomes. If risky geopolitical or economic moves ultimately succeed, history will reframe the contemporary uncertainty and chaos as brilliant strategy, rendering moral objections moot over time.

Sun Tzu had a sophisticated understanding of probability, framing it as "balancing the chances of life and death." He advised acting only with an overwhelming advantage—a 6,000-to-1 margin of safety—a clear precursor to modern quantitative risk assessment, developed millennia before Fermat and Pascal.

Machiavelli, raised on the ideal that reading Cicero would create good rulers, watched as educated leaders like the Borgias started horrific wars. He concluded the 'education by osmosis' model was flawed and proposed using history as a dataset—a 'casebook of examples'—to systematically analyze what worked, effectively inventing modern political science.

The word "Machiavellian," implying self-serving cunning, describes a fictional character, not the man. The real Niccolò Machiavelli was a selfless patriot who endured torture and exile for his loyalty to Florence. The villainous character is a useful cultural idea now completely separate from its historical namesake.

Despite his efforts to remain a neutral historian in 'The Prince,' Machiavelli's personal awe for Cesare Borgia is palpable. He breaks into first-person narration ("He told me..."), revealing the profound, spellbinding effect Borgia had on him as an eyewitness to his power.

Judging leaders requires a dual framework. One must understand the world as it *is*—a messy place of power dynamics and flawed humans—while also aspiring to how it *ought* to be. Ignoring either perspective leads to a flawed analysis, creating either cynicism or naivety.

Many leaders focus on Machiavelli's preference for fear over love, missing his actual advice: the ideal is to be both. The belief that a nation or leader cannot inspire both fear and love simultaneously is a significant failing, leading to an over-reliance on coercion rather than a balanced strategy.

Counterintuitively, when Cesare Borgia conquered cities and wiped out local rulers, he was beloved by the common people. By installing a regime free from local factionalism, he delivered neutral justice for the first time in generations, making his brutal rule seem preferable.