What does barrow mean when he calls the scopes trial a struggle between two civilizations

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rosevelt. 1973. "slaves everywhere"

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 correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.