The Inca Empire operated with features of a modern totalitarian state. It had no private property, markets, or money. Citizens were subject to forced labor drafts, wore state-mandated clothing, and owed absolute obedience to the emperor, creating a repressive society that bred resentment among its conquered peoples.

Francisco Pizarro's initial success was built on a partnership with Diego de Almagro. By negotiating a vastly superior royal deal for himself, he sowed the seeds of a bitter rivalry. This internal feud between the co-founders would fester and ultimately prove fatal to their entire enterprise and their lives.

The two dominant powers, Rome and Persia, engaged in a decades-long, civilization-shattering war that left both empires fiscally and militarily broken. This created a massive power vacuum, allowing newly unified Arab tribes to expand with astonishing speed into unguarded territories.

Conquistador expeditions were entrepreneurial ventures, not state campaigns. Leaders like Pizarro formed partnerships, raised private funds, and invested in high-risk "island hopping" operations hoping for massive returns. This model privatized both the risk of failure and the rewards of success, mirroring modern venture capital.

For the Spanish, the first concrete evidence of a great southern empire wasn't raw gold, but a raft carrying manufactured goods like golden tweezers and mirrors. These items demonstrated a level of craftsmanship and social organization that signaled a truly advanced civilization, far more than simple resources could.

Despite building a massive, highly organized empire, the Incas had no written language. This means nearly everything known about their history and culture was recorded by the Spanish after the conquest. Their entire legacy is therefore filtered through the lens of their destroyers, creating a fundamentally biased historical record.

Civilizations don't fall directly from war or plague. They fall when these shocks trigger a psychological shift from an open, exploratory mindset to a fearful, protectionist one. This 'Spartan mentality' stifles the innovation required to overcome the original challenges, leading to decline.

Francisco Pizarro's invasion of Peru was heavily influenced by the recent success of his cousin, Hernán Cortés, in Mexico. The fall of the Aztecs provided a tangible model for conquest, proving that small bands of conquistadors could topple vast empires. This precedent made it easier for Pizarro to secure funding and royal support.

Unlike peers seeking wealth, the illiterate Francisco Pizarro was driven by a thirst for glory. This personal ambition, rather than simple greed, fueled his relentless expeditions at an age when most conquistadors had retired, demonstrating that non-material motivations can drive extreme risk-taking.