User blog comment:Kalitu/Racial abilities-perks?/@comment-24205786-20130720041051/@comment-4536066-20130720053910

I think cross-race abilities are a little more starkly divided than cross-group abilities. It stands to reason that, since most of humanity has been progressing at about the same pace, they're all on fairly (not perfectly, but fairly) level ground when it comes to technological and technomagical advancements. Basically, what I'm saying is that humanity might have access to commorbs and magic that affects the consciousness, but the temple knights are justified in having the most advanced, compacted, muti-functional versions of commorbs, and lunar mages will have the easiest time weaving the most complicated mind-magicks with the least effort.

It's a little different with inter-human things because, as I was talking about below, humans have millenia of disadvantages against gnome and dwarf technology, which is not a problem they have with other human inventions. A human might not be able to exactly reproduce a temple knight commorb, but he would realistically have the resources at his disposal to create a similar device that performs similar tasks using a similar concept. A human mage might be able to reproduce a gnome glider by fusing human technology with human magic (instead of relying just on technology, like gnomes) to create something that distantly approaches the original design, but odds are it would be painfully inefficient, exhausting, and not practical for long-distance use.