Have you tried the tag search here? If you click "Search" and then click "Tag Search" you can click on any tag there and pull up any thread that's been tagged as having to do with that topic. Yeah, it's a LOT, but you'd be able to get a really broad view of what many people think about hierarchy, among other topics. You could also click the tags for "primary", "secondary", "secondaries" and "primary/secondary" if you wanted. And resurrecting a thread is TOTALLY fine here, since there's always new people around to contribute to it.