I may be asking a stupid question, but I can't understand "until" here. This says that his ways- primitive man's ways - appear crude(not skilled) until we find our next-door neighbor's similar behavior(bloodletting as you quoted).
Is it saying the two behaviors are similar to each other or the latter is better than the former?
Often his ways appear incredibly crude to us moderns until we remember how our next-door neighbor acts in like emergencies.
- For Teachers