Humans can do it too, I've done it a couple of times, but it generally only happens when you run out of stuff to get in a particular path (so you'd be able to pick a path after getting all the stuff in your current one). Basically, it means I get to pick another path after like 30 or so levels. Of course, this is pretty much impossible with the current slow leveling. You can, however, recruit some heroes with multiple paths.
