I really don't agree with that. We've solved many problems of the past, we've created many comforts, and we've created many accommodating structures, but we're mostly still at the mercy of forces greater than ourselves which can drive us into poverty/misery if we're not careful/able-bodied/lucky (and that's using "we" to mean middle+ class people in developed nations, which are a minority on Earth). We are also staring down numerous catastrophic futures, with hope for our children to live comfortably rapidly dwindling.