Emily Chertoff for The Atlantic:

Of course, as we all know, the best way to get people to buy more clothes is to make the clothes look slightly different every year, even though, almost no matter what you do to them, they will perform their key function of making you not-naked. And so tailors introduced design elements from military garments into civilian clothes, elements of evening-wear into daywear – and vice-versa – and so on.