With some exceptions, short story collections are usually just a series of unconnected tales. And even when they do have a connection, it’s usually based on some narrative device (all the stories were written by God) or based by where they were first published (The Complete New Yorker Stories). But in Children Of The New World: Stories (paperback, digital), writer Alexander Weinstein connects his sci-fi short stories with a theme, one that not only makes for good storytelling, but good cautionary advice as well.