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.

Unlike China's vast, easily unified plains, Europe's geography of mountains and rivers created natural barriers. This prevented a single empire from dominating and instead fostered centuries of intense competition between states. This constant conflict spurred rapid technological and military innovation, ultimately leading to European dominance.

The Spanish didn't defeat the Inca Empire at its height. They arrived after a smallpox epidemic killed the emperor and a subsequent brutal civil war between his sons shattered the empire. This left the civilization politically fractured and militarily exhausted, making it ripe for conquest by a small force.

External shocks like wars or plagues don't destroy golden ages directly. The real danger is the subsequent societal shift from an open, exploratory "Athenian" outlook to a closed, protectionist "Spartan" one. This fear-based mentality stifles the innovation required for regeneration, leading to decline.

Geography provides the foundational 'hardware' for a nation (e.g., navigable rivers, defensible borders). However, this must be paired with effective 'software'—governance, laws, and culture—to achieve prosperity. One without the other, like in Argentina's case, leads to underperformance.

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.