Where is research that shows the optimum climate for our biosphere? The first question must be: where is our current climate and trend in relation to this finding.
Strangely, nobody seems interested in this vital comparison. Not so strangely, the solutions that are frequently demanded in the most urgent voice, all converge on a socialist worldview: statism, bigger government, higher taxes, less personal liberty, even fewer people. That bigger picture tells me all that I need to know about “climate science”.
We are 3 million years into an ice age. When it ends, the earth will return to its normal temperatures about 6-9 degrees warmer on average, than it is now.
Those were also the answers when we were headed into the next ice age, 40 years ago. It's amazing how flexible that set of solutions can be.