I think division is actually very important, younger generations face an existential need to sever themselves from the worldview and belief systems their parents raised them under (and return to value systems that have embodied humanity for literally the entire rest of our history) in order to save as much of humanity and nature as possible.

Inaction as well is possibly our most potent weapon against the coming mass experience of suffering that climate change will wrought upon us. We all have to stop doing, we need to grind the global economy to a halt and scare the shit out of capitalists to the point that bargaining with us is preferable to letting the scarier alternative happen.