You might even be tempted to assume that humanity has little future to look forward to. But such gloominess is misplaced.

你可能不知不觉地认为人类的未来没什么好期待的。但其实也不绝望。

We need to go out and shake all this gloominess.

需要出去走走 把沮丧统统抛开。

So despite the gloominess of many topics,   we want to approach them with informed and well researched optimism – not brushing  humanity's very real challenges aside, but also not falling into the trap of pessimism.

因此，尽管许多话题令人沮丧，但希望以知情且经过充分研究的乐观态度来对待它——不要将人类真正面临的挑战抛在一边，但也不要陷入悲观主义的陷阱。