If humanity had a brain – if we had a truly global society rather than a world of suspicious and antagonistic tribal nations – it would be obvious what we must do. We would collaborate on a massive overhaul of our buildings, transportation systems and economic infrastructure to improve energy efficiency and to shift away from burning fossil fuels. But we cannot wait for a slow process of consensus. Let us not whine about whether we will be somewhat disadvantaged by moving first in a direction which all must move eventually. It is better to take a small disadvantage ahead of the crowd, in order to gain the benefits of leadership.