"I'm alive because my aunt was born.

My grandfather was conscripted into the Romanian army as a medic, and his unit was one of the many acting as a defensive barrier, covering the Nazi supply lines to Stalingrad. She was born, and he was called back to Bucharest from the front. While he was on leave, the Russians launched Operation Uranus, which decimated the axis forces. He recieved word that his unit had been completely destroyed. He was never reassigned, and in 1948, my mother was born.

I'm also alive because a bunch of Romanian cows got sick. My other grandfather was a pharmacist, back when that meant actually making medicines, he was also a Jew. The town he lived in was largely agrarian, and their cow herds came down with some illness that was killing them. He whipped something up that cured them. The townspeople were very grateful to him. So grateful that when the chief of police heard that the Nazis were coming to town to take inventory of who lived there, he came to my grandfather's house with some train tickets for him and his wife. They escaped the Nazis, and never got caught. My father was born at the end of 1945.

I guess this is the opposite of the butterfly effect, really. Rather than one small action blowing up into a much more important chain of events, two hugely improbable events are eventually lead to my birth(and obviously my extended family as well)... and now, I run ads on the internet."