The most cost-effective steps - Tradução em português
"A great leader acts in awareness of the big picture and accepts responsibility for the long-term consequences of the policies he or she pursues. With regard to existential risks, the challenge is neither to ignore them nor to indulge in gloomy despondency, but to seek understanding and to take the most cost-effective steps to make the world safer." In short, better safe than sorry.
to take the most cost-effective steps = tomar as mais custo-efetivas providências