Have you ever heard the famous "BUTTERFLY EFFECT" ??? Or "the fluttering of a butterfly's wings can cause a Tsunami on the other side of the world"
First case: In 1954 a 12-year-old boy parked his bicycle for a few minutes in a store to make several orders! But when he came back he found the big surprise that his bicycle had been stolen!
Angry and very angry! The boy decides to go to the police station and report the case!
He told the police officer that when he caught the thief he was going to beat him up, the officer who was also a boxing trainer to try to calm the boy told him that if he wanted to hit the thief he should learn to fight first! The name of that child was "CASSIUS CLAY" known worldwide as Muhammad Ali professional boxer.
That is, if his bicycle had never been stolen, that world-renowned fighter would never have had the intention of learning to fight!
He was appointed as 2nd officer in a very important vessel, however because of his attitude he was fired shortly before he left!
His name was David Blair, and when he was fired Blair forgot to take a set of keys from his pocket out of his pocket and took them home! Those were the keys of the box where they were ALL THE BINOCULARS OF THE BOAT EL TITANIC 
Not being able to open it, the officers could not see the horizon clearly, and GOOD sadly! We already know the FINAL LAMENTABLE.!
There occurs the BUTTERFLY EFFECT! because of having had those Binoculars at hand, probably that catastrophic event never happened
In the middle of the date of 1918 at the end of the first world war The German army retreated and the conflict was over, a British deaf named Henry Tandey found himself face to face with a German soldier who was wounded and disarmed, Henry pointed him out, but nevertheless as the war had already ended, he decided Forgiving his life, he lowered his weapon and continued. After all! The war was over, and what harm could an unarmed and helpless boy do?
GOOD to have shot without knowing it, Henry Tandey would have completely changed the course of history! Since that young soldier who spared his life was Adolf Hitler 
In the mid-80s a boy with dreams frustrated of being a musician, accompanied a friend of his who was an actor, to an audition of a horror movie, unfortunately his friend did not get the role, but the strange charisma of the young companion called the the director, who invited him to be part of the audition, surprisingly the boy who had never before in his life thought about dedicating himself to the performance stayed with the role.
the name of the young man is John Christopher Depp
Well that was all! I hope you liked it and you like it! If you have a story to tell about "Butterfly Effects" let me know! Thank you! Kisses!