The committee assigned to tackle security thought that Sieber’s notes of caution would create a security environment that was not in line with how they envisioned the Games. In the end, they ignored the prediction. With Seiber’s forecast, the only inaccurate detail was that there were only eight terrorists instead of twelve. The terrorists got into the building pretty quickly, as the security was lax. The authorities tried to rescue the hostages, but they all died during the rescue operation.

To save face, Sieber was removed from his advisory position as they began working to hide evidence of their mistake, which was not listening to his warning.

#2: Charles Colchester Advised Lincoln To Watch His Back

Abraham Lincoln was shot dead on April 14, 1865, in a theatre in Washington DC. But before this tragedy happened, Charles Colchester, a British clairvoyant and a close friend of the first lady, told the president of the dangers in the early months of 1865. However, Lincoln was skeptical about his “abilities” and did not pay much attention to Colchester’s warning until it was too late. Lincoln was killed by actor Wilkes Booth while watching a play in a private box of Ford’s Theatre.

What was intriguing about Colchester’s position was that he was also friends with Lincoln’s killer, so there were speculations that he was not a clairvoyant but a guy with some inside information that he decided to use to warn the president of the plotted assassination.

Weeks before the murder, Booth stayed at the National Hotel, just six blocks from Ford’s Theatre. During those times, he shared his plans to kill the president with his close friends, although it was unclear if Colchester was one of those.

Colchester fled Washington after the president’s inner circle started confronting him, and he died in Iowa after a few years.

#1: Ferdinand Foch Predicting World War II

Nothing could be on par with the impact this warning has on human history. If people had listened to this person, we could’ve avoided the gut-wrenching World War II.

French officer Ferdinand Foch was the one who assumed command of the Allied forces beginning in March 1918 and witnessed the hard-fought final victory over the Central Powers. The major powers of Europe were no doubt exhausted after four years of relentless fighting, and restoring peace was tough. After the Germans signed the strict terms of the treaty, Foch believed that their approach did not go far enough to eliminate the German threat entirely. He also believed the Germans would soon recover and threaten France again. Foch famously predicts:

“This is not peace. It is an armistice for twenty years.”

And he was right. Germany invaded Poland almost two decades later.