Of course I've always believed that whatever our lives are in the present is a result of a chain of events, one leading to another. Switch out one of the events and our lives would have been outstandingly different, for better or for worse. For example, a person that got a job opportunity that helped them travel the world, meet amazing people and build great relationships, might have happened because the read about a job advert on social media and only because they opened their smartphones at the right moment. If they had not done that, they might have retired poor. Just picture it when someone, when remarking about a tragedy or a positive event, says: "The day I met him was the day my life changed." Or "the day we had that bitter quarrel was when all the trouble started."
That's why I always try to predict what result the current set of actions I'm taking might lead to. By understanding that a tragedy always starts with one simple action and is followed by others until the tragedy is birthed, makes me try to predict what and what will follow each action I take and what it will ultimately lead to. Though in this regard, no human being can be 100% accurate.
Precisely. All of the horrors of the world, the worst humanity has created and done - started somewhere. And it could be (and probably likely) that the key action was something simple, something seemingly irrelevant. Yet, it led to holocaust and genocide, and dropping nukes.