One of the flaws in the concept of “History” is that important events trigger other important events, but that’s circular; it’s how we define “important.” Something is historically significant because a historian pointed at it and says, “See? Here is where that sequence of events got rolling.” That’s a conceit. Causality is real, in that events cascade in sequence and if one of them didn’t happen, subsequent events wouldn’t happen either, but human attempts to frame it are mostly an exercise in self-importance. In case you’re not up on it, that’s Michel Foucault’s main point: our interpretation of causes is always seen through a lens formed by existing power relationships.