Your gut is telling you something. Listen! In modern Western society, say the word “bacteria” and alarm bells go off. Germs! Disease! Danger! Modern society seems bent on viewing the microbial world with a combination of fear and disgust. The truth is, though, for the most part, microbes, those tiny single-celled organisms too small to see with the naked eye, are our friends—at least, the ones that live inside our gut and on the surface…