6.
Ecomarxism
The root cause of the climate crisis is our obsession with "more"; working more, eating more, owning more...however, to truly stop this capitalistic plague, we must cut it off at the root. Therefore, instead of convincing others to work less, eat correctly, and buy fewer things, we must instead make it so that they have no choice. If we want people to eat vegetarian, stop offering meat at grocery stores; if we want to reduce car emissions, make fewer cars. It's as simple as that.