How was Leonardo's sketch book a testament to his genius?

assuming that you are talking about the one in egypt: hecka oil

explanation:

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate

the quote by walter cronkite contributes to the central idea of the text by supporting the central idea. cronkite argues that what is deemed “right” for and in america may not be good for other countries. this supports the central idea of the text, that the vietnam war was unpopular in america for multiple reasons- including cronkite’s.