You say that you are more careful now (and everyone should always be
more careful!); but is it not, in fact, irrelevant? This is because
the worlds in which you cause great tragedy exist even before you
arrive at a branch point that could take you to them.
I am taking this from the saying:
'everything that can happen does happen and is happening right now'
It is also my understanding that time travel (travelling along
timelike curves) is quite possible; I have always grown up being told
that it is not possible. Altering my worldview on that one is taking
some time! To me it is the ultimate surveillance tool and makes me