What if you could go back in time to take a peek at the life of someone who would go on to change the world? Would you want a chance to see them when they were still an unknown, when no one around them might yet suspect their future significance?
Would you like to peer through the schoolhouse window to see Einstein as a child, figuring sums? What if you could sidle up close enough to hear him thinking aloud under his breath?
Would you like to disguise yourself as a merchant or laborer in seventeenth-century Latvia, there to catch occasional glimpses of the humble child who would grow to become Catherine, empress of Russia?
Imagine placing yourself in just the right spot on a street corner or busy marketplace, where you will opportunely bump shoulders with a yet-unknown Oprah Winfrey, Benjamin Disraeli, Toyotomi Hideyoshi, George Eliot or Andrew Carnegie?
In the future, this will be possible. Time-travel tourism—going back in time to spy on the famous before they were famous—will develop from a curiosity to a boutique industry to an enormously popular leisure activity.
Floods of people will pay handsomely to be transported back into the past, outfitted with period-accurate clothing, and placed strategically to get a look at a future giant of history.
Of course, there are strict rules about interacting or interfering in any way. We can't have time travelers changing the future on us. They only look—they never speak, never touch.
So ask yourself: Do you sometimes feel watched? Do you sometimes feel the eyes of strangers on you?
Might this explain it?