The drift scenario - don't do anything significant.
Here is the do-nothing scenario, just drift upwards on the graph of rising temperatures and exponentially rising almost everything else.
Obviously, people are doing all sorts of things,
from eating less meat to solar panels on their roof and buying EVs. But we are not doing anything at scale that could possibly reduce the amount of CO2 going into the atmosphere, much less the amount of CO2 that is in the atmosphere already. This means the temperature will continue to rise. Socio-technical breakdowns will increase, further limiting our ability to evolve technically. People argue plausibly for doing nothing on the idea that doing anything will only make the problem worse by increasing CO2 production, lowering profit, and increasing social tensions. The same consequences, unfortunately, fit with doing nothing. . This scenario shows a large dimension of complacency, but many are paralyzed, based on the understanding that anything we do will make the situation worse. The overwhelming implication of the ocean for fish and ice melting, increasing inequality, increasing likelihood of war, and major power competition, along with the weakness f governments and leaders is deflating morale until one sees that everything must change. "Would you rather we wait fifteen years and then collapse, or try to change now and collapse now? The bet is on continuity rather than wholesale change.