Nah, capitalism is just the most efficient system for economic growth. It's economic growth that's driving climate change, and economic growth is driven by population growth, reduction in poverty, and the hedonistic treadmill. It doesn't matter what -ism you put on it, climate change is driven by burning fossil fuels and every -ism would do the same. Fossil fuels are a very decentralized incentive problem; they are everywhere, the externalities aren't felt locally, and not until much later. The consequences that would change behavior just aren't there, and consequences are the only thing that changes behavior.