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I've done it by living in a place where it rarely goes above the 70s. No one has an AC.

This, after living in places where you walk outside at 8 am and get drenched with sweat (your own, btw) and enjoy -20 to -30 in winter.

Underground air channels that cool the air, and a tall dark chimney. The sun heats the chimney, which heats the air in the chimney, causing it to rise and draw air from the underground channels up through the dwelling into the chimney. Constant cool flow powered by the sun. The underground channels should be at least 3 feet deep. Usually the temperature under 3 feet is about 60 degrees. Good wall insulation, efficient double-pane windows with IR and UV reflective film, light colored exterior walls, except for the chimney contribute to the efficiency. Multiple chimneys can be used so long as they connect to a common intake manifold (you don't want air sucked down one chimney into the dwelling to reach another chimney). Longer underground channels will give cooler airflow. Best to use curvy channels (or have vortex inducers inside straight channels), separated from each other as much as possible. Also works as emergency heating in the middle of winter.

I've seen similar elements incorporated into older homes in my travels.
I believe the only reason they aren't included in green new deal-style schemes is because, despite their ability to conserve energy much better than modern cooling systems while accomplishing the same task, all of it relies upon electricity, which can be used as a means of control, especially since what they're proposing would be more miserable without power than earlier-style homes would be.