That requires a very specific understanding of progress. It requires that you take the position that the world is an imperfect place for humans to live, and that there are adaptations which make it better. Although this isn't unlikely, it's also not self-evidently true.
True, but we (humans) are always aspiring to be better, even if things aren't broken per se. My point was that we don't always know what we can't do, so when do we stop trying?
Then there's the fallacy of composition. Each of us may be powerless as individuals to make a change, like political or social reform, but collectively we often can.
Various religious, spiritual and even political belief systems through time and space take a different position on this. Buddhism in particular encourages an acceptance of the world as it-is (while also encourages small acts within that world to reduce suffering). There are many religious systems in which one becomes better only as a spiritual, inward matter, not by changing the world.
