But here is another argument in favor of the existence, indeed, the burden of free will.
It has been argued quite seriously that the invention of beer was crucial for human development because fermented grain allowed us to deaden our awareness of our own weight of responsibility for our actions in our lives.
It has also been argued that a factor in the rise of agriculture was to provide a more reliably available feedstock for fermentation thn the occasil self-fermenting beres found while gathering, but that is a separate chain of discussion.i
In short, I am arguing that if we do not have free will, we would not find mind-altering substances so attractive, because these substances reduce our will, our control, leaving our genetically programmed instincts and behaviors a far freer rein.
*blinks innocentishly* Oh I would never take advantage of you, Trie.
Unless you asked me to, of course.