In some countries, they call them the "abandonados," the abandoned ones. They're the impoverished mentally ill and mentally disabled patients being warehoused in psychiatric asylums that are more run-down, more uncaring than the most brutal American prisons. Confined in cage-like cells, tied to beds soiled with human waste, medicated to the point of senselessness, or wandering naked in unheated and garage-like wards, they live in what can only be called the shadows, their plight unseen and too easily ignored by the rest of the human family.

Working first as a journalist, later as a...