Even if the Greens or similar left-wing parties win the next election in every single country around the world (which unfortunately isn’t going to happen), it still wouldn’t be enough to give humanity a chance of survival. The climate crisis is far too advanced for that.
What we need is an immediate change to the way societies are run, and that is impossible within the political and economic systems that currently govern our lives no matter where we live. It can only happen now through protest, strikes, and generally refusing to live the way society wants us to.
An example of how useless electoral politics now are is in Japan, where there is a higher chance a far-right nationalist leader will be the new PM than the centre-left CDP forming a government. And there is zero chance of any left-wing party making any real impact.
Recently, we’ve been seeing record job vacancies and employers struggling to attract workers back. People have realised that they are endlessly disrespected with slave wages and poor conditions. They’re sick of it and they want to get off the hamster wheel. And this is exactly what we need; the people to hit the elites where it hurts. Once the ruling class of mostly boomers realise that the game is up (no matter how much they attempt to rig democracy), they’ll escape in the life rafts. We’ll be left with a sinking capitalist ship, but at least we’ll have a chance to swim to the eco-communist island. But it has to happen in the next year or so for it to be salvageable. If we wait another 4 or 5 years for the next elections, it will be too late. Especially because it doesn’t seem likely that the right kind of parties would win even then.