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There's a theory that humans first discovered wine when a hungry soul chanced upon some wild vines in late fall, their bunches well past ripe, rotten and slightly fuzzy with a blush of mold. Their taste would have been unlike other grapes, the skin having little resistance, bold and spicy with a little effervescence. But what really made them different was what happened afterward! Definitely a heightened sense of euphoria, perhaps a new-found ability to dance, possibly uncontrollable laughter or intense and profound conversation, and maybe after several bunches the fool-hearted courage was mustered to finally show that damned saber-toothed tiger who was boss.
What is quite clear from that first encounter is that the element of wine that kept us coming back was its ability to make us drunk! As we have evolved, so have our reasons for loving wine. But it is surely the transformative power of drunkenness that initially propelled wine from rotten grapes to the level of the spiritually transcendent beverage of the Elysium mysteries of the ancient Greeks, as Elijah's drink of choice at Passover or as a reasonable substitute for the blood of the son of the Christian God.