We also knew about "The Limits To Growth" in 1972. And were also unable to implement any social change.
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https://www.theguardian.com/commenti...aring-collapse
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Free market capitalism only functions with growth. With no growth there is no investment. There is no opportunity for the poor and middle class to ascend. So there is no motivation to work hard. Without growth. By the time we started to figure all of this out in 1970, we were already trapped in a flawed system that requires cornucopian access to increasing amounts energy and natural resources to keep from crashing. In the last 20 years we have grown world debt to a level far beyond what can ever be repaid due to physical limits on resources and energy.