You can tell a lot about a society from its stock images. Not what the society is really like, but how it likes to perceive itself. Take, for instance, the pervasiveness of one particular genre of stock image, Woman Laughing Alone With Salad. Here are but two examples:
And here is a whole page of them. Let us examine Woman Laughing Alone With Salad. Why are all the models laughing? Would Staring Pensively Into the Distance With Salad be unbearably depressing? The laughing seems strangely desperate.
What other trends in stock imagery have you noticed? Happy Family At Dinner Table, perhaps? Cute Little Boy Playing Outside In Suspiciously Clean Shirt, Self-Satisfied Mom In Background? This demands further investigation!