I would like to think that some of my teaching influenced some of the children to do things and strive for things that they otherweise would not have, so in 20-50 years one or more of them may well achieve something that had I not existed they would not...therefore turning it on its head, if I never existed then one could postulate that they would not achieve what achievements could be directly attribued to me... Lol, its complex because first one has to postulate that you HAVE had an impact even if down the line in the future, then reverse this and postulate what may not happen that may happen..
Well seeing how I would like to eventually get married, and have had some impact on the lives of friends and family (had I never been born, its likely my brother wouldnt have been born either). The change to the world would be small, but it would effect the world.
To the world you might be one person, to one person you might be the world
I chose 10-20 years because, though every action (or non-action) has an effect of some kind, I don't think that anything I did younger than 10 or so would have effects that would make the ATL of my non-birth different from OTL.
Now, in middle school through college, I imagine I've had many opportunities to affect people (relationships with others, that editorial I wrote for UGA's "Red and Black" newspaper, this board, my other writings, etc). Those slightly bigger things could butterfly down the road (my editorial might have convinced enough people to not support John Kerry to seriously affect his chances of election--in the ATL, some ex-Kerry supporters would stay Kerry supporters, campaign for him, etc).
Of course, I will concede that my having such a great influence by writing an op-ed in a college newspaper is likely a pride fantasy, but one never knows. Unknown people have influenced known people throughout history...abusive boyars affected Ivan the Terrible, someone much like "Max" in the titular film could have turned Hitler from anti-Semitism, etc.
History is a complex system. As long as the system is stabile, a single person deosnÂ´t matter at all, so no changes in history if I am not born. But for how long is this system stable? In every century we see at least 2-3 phase4s of instability. In these times butterfliles are much more likly to happen. Than a 5 year period is not unlikely.
If I wasnt born I couldt be elected vice-president and then secretly assasinate the President in 2037 by blaming it on terrorist. Going before Congress, red eyed(from consoling the former first lady) I would then ask for "Emergency powers" to hunt down and destroy terrorist and their sympathizers within the US. After that.....