Cylon resurrection is not nearly as much fun as it sounds. And, in any event, humanity is still quite far away from being able to back up itself.
Lately, there’s been a meme going around about the need to backup humanity by establishing new colonies in space and on other worlds. Although this has a lot of appeal in light of the recent meteor explosion over Russia, the nuclear saber rattling by North Korea, and the myriad of other ways we could destroy ourselves, the concept is deeply flawed. One problem is technical, the others political.
Humanity is not a hard drive. In computing, you can make exact copies of whatever data are on you computer and put them elsewhere in case the hard drive fails. Humans don’t work that way. Until we can develop a Cylon-like ability to download our consciousnesses into identical bodies, backing up the human race won’t work very well. Or, at the very least, it will have limited utility.