Evolution is truth. However we don't evolve in our bodies anymore. Other animals still do of course but post-humanity won't differ dramatically in physical makeup (unless we go deeply into body shaping or human-machine integration, but that's just an outgrowth of the main point here).
We evolve in our minds. Our bodies are rapidly becoming immaterial except as a support substrate for our minds. Our evolution now molds the social constructs we create for ourselves to live within; our evolution grows with and empowers our ability to find accurate meaning large data sets; our ideas are what spur our future growth and drive our advancement as a species. Vast wealth and power have sprung from the well of innovation but that innovation did not spring from our DNA. It sprang from the brains the DNA created and even more it sprang from the combined effects of social interaction of many or those brains well rehearsed in the workings of the vast computing devices that were envisioned and built by the brains that came before them.
Historical evolution enacted its course through the buildup of physiological and organizational changes that drove competitive advantage. Future evolution will enact its course through the buildup of changes in society, psychology, and mental prowess (either unaided or reinforced by artificial mechanism) that drive the human species into a successful future. Our bodies, if they evolve at all, will largely evolve only to support more powerful or adaptive minds. So if our bodies decay or are poorly adapted to our environment, or happen to exist in a difficult environment the next evolutionary step is to adjust society to better support those bodies. Building up every body leads to more and better functioning brains which further drives evolution forward. Evolution demands comprehensive and effective welfare. Because the mind of every child is our evolutionary future, regardless of that child's family history or the present outlook of its future. Every child's future is malleable regardless of the capacity of their body. If they get sick, they should be made well. Because it can be done, because evolution no longer relies on our bodies, because that child's contribution should not be unnecessarily undercut by physical malady. Every human in need should be lifted up because every brain has the capacity, given the opportunity, to contribute something to society regardless of the circumstances of the life of the body.
