We don’t lack intelligence to solve our problems.
We lack awareness of how our own perception creates our problems.
That is humanity’s only true problem.
BTW this doesn’t mean that we don’t focus on solving problems. It just means that to solve them, especially the emerging complex ones, it requires a perception that most people don’t have to make sense of them.
It’s like trying to fix a broken machine in a dark room. Transforming perception turns on the lights, letting intelligence be applied meaningfully. So the more people whose perception are transformed (which takes time), the more people will be able to work on these complex problems.