Just because we are effected by our past, doesn't necessarily mean that we don't have control over our future decisions. If the waffles make you salivate more so than the pancakes, it does not follow that you are required to eat the waffles - which is what a world without free will would necessitate. The world may be determinate in nature, yet still provide us with the ability to make decisions based on arbitrary whims (this position is known as compatibilism).
Brevity is the soul of wit.
