IMHO, if one country does take significant action, the country now has strong incentive to advocate the same change for neighbors (because otherwise it's just l

IMHO, if one country does take significant action, the country now has strong incentive to advocate the same change for neighbors (because otherwise it's just losing out on competition), and these neighboring countries' activists and politicians can now point to the first country as an example. It's already happening in limited scale: for example, more and more countries plan to ban ICE vehicles altogether. The more countries join the idea, the more "normalized" the idea becomes, which will force vehicle makers to take notes (because what's the point of designing vehicles if you can't sell them to most consumers), at which point the "battle" is won. So, "one country taking initiative", while not being enough in itself, is a perfectly viable way of starting political change.