Ever since you were born the world is constantly changing, not just through big events but in smaller ways too.
At some point in the future, everyone who is currently alive, will be dead and the earth will be populated with people who do not exist yet.
Since I was born when my parent were in their late 30’s. And my father was as well, so my paternal grandfather was born in the 1890’s. When I was a kid he told me stories of his childhood. I was only 9 when he died, and at the time his stories were just that; stories. Now (I’m in my 50’s) I wish I had asked him things about those times. He was born and grew up in a world (mostly) without electricity, and without cars, phones, etc.
He was someone from a totally different world, and I knew him.
Added later: He was born “only” 129 years ago, everyone alive then, is now dead.
