Consequences are near impossible to predict and rather difficult to judge, even in hindsight. For example, the Baby Boom generation, so interested in besting their elders in freedom of thought, turned into the kind of wimp-ass parents who dumb down education so every kid could pass. And you could argue that Nixon's "southern strategy" put an end to intellectual conservatism, allowing mindless rednecks into the Republican mainstream.
The same is true when it comes to food. A search for spice trade routes that bypassed conniving Mediterranean middlemen in part led to the discovery of what is now the Americas. Knowledge that fire could be used to cook food allowed the body to better absorb nutrients, which caused the human brain to grow and eventually launched us on the road to the modern world--a process hardcore raw foodists are trying to reverse, but that's an aside.
We mention all this as a way of admitting that any 'top 10' assessment of historical significance is fraught with problems. But what the hell--some of us started school before Boomers took over, so we're not afraid of stirring the pot a bit.
So here is our list of the most important things to happen in the world of food, dining and culture--keeping in mind that by "world" we really mean "the American world"--in our lifetimes...keeping in mind we mean the last 70 years or so.
10. The Supermarket
The Tom Thumbs and Walmart Supercenters we know today resulted from post-World War Two urbanization, the car culture and in-home refrigeration. Hard to imagine, but there was a time--even in the 20th Century--that Americans shopped almost daily at mom and pop groceries, the kind where clerks pulled goods from the shelf for you. Convenience wins out, almost every time.