As you get older, you prefer things that you are familiar with and control. You may call it, the explorer/exploit algorithms. Basically put, we have two basic algorithms in our brains, when you are exploring, you are looking for new places/technology/source of energy and so forth. Needless to say, that this is, predominantly, the algorithm that is common in young, no matter what species. As when faced with the challenge of life, they need yet to find their place, their partner and so forth. As we grow older, well, we start exploiting whatever we have acquired, and scorn, fear, novelties, as they offer an unnecessary risk to your well-being. Accordingly, revolutions are never brought about by the previous generation but by future ones. This future that the new generation has yet to explore.