Some fortunes are built on innovation. Others are built on crisis. From war profiteers to plague merchants, we're counting down six shrewd operators who turned humanity's darkest moments into personal goldmines—and examining whether their legacy is brilliance or villainy.

In 1066, a bastard duke from Normandy crossed the English Channel and pulled off the most profitable military operation in history. Within months, William controlled 20% of all English land personally and redistributed the rest to his cronies, creating a fortune that modern economists estimate at $230 billion—all documented in his extraordinary Domesday Book. This is the story of how one brutal invasion transformed a mercenary adventurer into one of the richest men who ever lived.

In the cutthroat world of 19th century railroads, two legendary tycoons clashed in a no-holds-barred war for dominance. Cornelius Vanderbilt, the aging Commodore worth over $100 million, faced off against Jay Gould, a cunning young speculator who would stop at nothing—including bribery, stock manipulation, and literally printing fake shares—to win. Their epic battle would reshape American capitalism and prove that even the richest men could be outmaneuvered.

What happens when billions in gold, jewels, and land simply disappear? From the Romanov fortune scattered across Europe to the missing treasure of the last Chinese emperor, we're counting down seven jaw-dropping cases of royal riches that evaporated into thin air. Some were looted, some were hidden too well, and some simply slipped through history's cracks.

Before the Rothschilds, before the Medicis reached their peak, there was Jakob Fugger—a banker so powerful that emperors were in his debt. He financed Charles V's election as Holy Roman Emperor, monopolized Europe's copper and silver trade, and died with wealth equivalent to 2% of Europe's entire GDP. This is the story of how a merchant's son from Augsburg built an empire that made kings tremble.

Two titans, two industries, two philosophies—but only one could claim the crown of America's wealthiest man. John D. Rockefeller conquered oil with ruthless monopoly, while Andrew Carnegie dominated steel through vertical integration. Their rivalry defined the Gilded Age, but their contrasting legacies in philanthropy may have mattered even more than their net worth.

Fortune can vanish faster than it's built. From railroad barons ruined by Black Friday to dot-com billionaires wiped out in hours, we're counting down five of history's richest people who watched their empires crumble in the blink of an eye. These aren't just stories of loss—they're lessons about the fragility of even the greatest fortunes.

In 1324, the Emperor of Mali embarked on a pilgrimage so extravagant that he destabilized entire economies along his route. We explore how Mansa Musa—often considered the richest person in human history—accumulated his wealth, why his generosity backfired catastrophically in Cairo, and what his fortune would be worth in today's dollars.