TJ (I prefer Thomas, or Tom, a beautiful name in Flanders)
Sometimes history has be changed by a single man, although that single man can be the product of different events. On most occasions the way conflicts end have in them the trigger for new conflicts and the people who pull that trigger are the products of those circumstances. But the way they have their impact on history depends entirely of their deeds.
Let's say that there is an interaction between the cicrumstances which makes history as it is and the man who influences those circumstances.