Sensible beauty pertains to the beauty of the person in their physical appearance while ethical beauty pertains to the beauty of the person's character or inner character where it does not rely on the outer image. The two are different in how they define beauty and how they are applied, the only thing that makes them similar is their similarities of trying to define what beauty means.
Wrting was necessary for the invention of advanced tools
without them, it would be hard to gather information and continue to advance in technology
The political situation in Vietnam during the 1950's was almost the same as the situation in Korea. The reason for this statement is that in both countries there were two parts, North and South, being politically opposed, and being supported by the USSR and the US. The North, in both Vietnam and Korea were with communist ideologies, and both of them were supported by the USSR. The South, in both Vietnam and Korea were with nationalist ideologies, and both were supported by the US. In both situations, the North was stronger, if the situation was that the combat was going to be one on one without the foreign support.
So that history does not repeat itself. By educating others on the horrific events that have occurred in the past, we can learn from it and work to avoid it from reoccurring. Hope this helps answer your question!