You might want to consider re-submitting this question. Your title implies you are asking about Western (ie European) technology versus Eastern (ie China/Japan/Asia), but the body of your submission seems to show you're asking about Native American societies. Those aren't generally considered "Eastern". I would suggest just titling it about "Europe" and "Pre-Columbian America", but do also check the FAQ as there are threads that touch on this topic there as well.