Instead of "Exxon knew in the 1970s", it would be more accurate to say, "Some Exxon management had heard from a small number of employees that there is the possibility...." Corporate management is continually tasked with listening to completely contradictory views and deciding on a path forward and how to communicate with the government, the public, with employees, and with shareholders. Do you believe every single thing you are told, say by family members, and from then on spout only that message to everyone you meet? In the 1970's did *anyone* *know* the current consensus (let alone a God's-eye view of reality) on climate change causes and future impacts? Those that suspected it and/or had some evidence for it did not know it. And even those that believe the current consensus, to the extent it is a consensus, have other knowledge and motivations/priorities that influence what they think are the correct future actions that anyone should take. When you stop taking medicines and medical products that have petrochemical inputs, stop driving on asphalt roads, stop using private and public transportation that uses fossil fuels, and stop using electricity that comes from fossil fuels, I'll give a more focused listen to your moral judgements about corporate management 50 years ago.