8. John Mackay: The Irish Millionaire
John Mackay’s rise from penniless Irish immigrant to one of the wealthiest men in America is a testament to both grit and fortune. Striking it rich in Nevada’s Comstock Lode, Mackay became a key player in the mining world, eventually founding the influential Mackay family dynasty. His humble origins and dramatic ascent embody the Wild West’s promise—and peril—of sudden wealth. For more about Mackay’s remarkable life, visit The Irish Times.
