We may be living in a modern world but a lot of our mental and physical machinery is still wired for our past evolution. In many ways this is a great thing. We as humans are the most adaptable species on the planet and it's allowed us to thrive. However, some of our new situations don't mesh well with the old stuff. So what's the answer? Go back to living in huts and being scared of the sun? Not even a little bit. We live in the modern world and we should make use of all the advancements it has to offer. There's a reason we've developed it. What we should do, though, is run everything through a filter of our evolutionary psychology and biology. Make peace with how we're wired and you'll be a lot better off than fighting against it.