Hi, Even more striking are the situations in which social attitudes concerning future diffi culties undergo rapid changes before the problems have come to pass— witness the heated controversies about the ethics of behavior control and of genetic engineering even though there is as yet no proof that effective methods can be developed to manipulate behavior and genes on a population scale. I'd writte it as a separate sentence. Even more striking are the situations in which social attitudes concerning future difficulties undergo rapid changes before the problems have come to pass .
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