Indeed, Frederic Bastiat was one of those geniuses of common sense.
What is the source of Bastiat’s genius? Arguably it is that he analyzes all things economic through the eyes of the individual. Economies aren’t living, breathing blobs; they’re just collections of individuals. And for an individual, “It is only too obvious that abundance would be advantageous to him.” As individuals, we’re all too aware of how few of life’s necessities or luxuries we could produce on our own. And if imports are wondrous for the individual (whether from across the street, or the other side of the world), which they are, they’re wondrous for an economy that is merely a collection of individuals.