What event caused a real-life butterfly effect for you?

My mother wore heels to work and slipped on the carpeted steps, resulting in a broken

high heel and a broken leg.

While she was home recovering, she somehow developed allergies that led to her needing

an inhaler to dose herself with penicillin.

The inhaler interfered with her birth control and now I have a brother

13 years younger than me. Nearly every single friend I have in college is because one day in my

gen ed health class, we had to pick a seat that would become our seat for the semester. When I came

in, there weren't many seats left, and the people I sat next to ended up becoming my

best friends, and introduced me to all of my other friends in one way or another.

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 German supply lines to Stalingrad.

My aunt 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 received 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, and he was also Jewish. The town he lived in was largely agrarian,

and their cow herds came down with some illness that was killing them. He whipped up something

that cured them. He whipped up something that

cured them. The townspeople were very grateful to him. So grateful that when the chief of police

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