If it were possible that other people in other times knew the problem, and had the solution to what are essentially moral issues that confronted them as they now confront us, then it is certain the good they sought would by now be obvious.
By what logical necessity would they 'now be obvious'? Is it not at least possible that things were discovered then, that have since been forgotten? Most modern people IMO have not the least idea of the Western philosophical tradition or even of any single philosophical idea in the traditional sense.
Now I don't want to glorify metaphysics or become sentimental about it, in the least. But I think many people reject it as outdated and old-fashioned without having the least idea what it means. I think it is possible to retain some meaning from the Scholastics and the Platonic tradition, without being a Catholic. I think in the modern view, it is all fused into a solid mass of dogma. You have to either swallow it whole, or reject it completely. But there are some clever contemporary Thomist philosophers around, and also an interesting cross-over between Thomism and Zen, that was started by Thomas Merton.
Now that we have access to many perspectives besides the traditional one, it is quite interesting to re-examine the old traditions in light of 'the perennial philosophy' as Huston Smith argues in Forgotten Truth.