Reddit reviews The Source: How Rivers Made America and America Remade Its Rivers

I'm reading a book by Martin Doyle that had a chapter describing the American Southwest's water politics. In it Doyle referenced an old growth (500 years old+) tree ring study that showed that the years of American west expansion into these states were uncharacteristically WET period for the region. This implies that the local climate is regressing to it's typical hydrology. Basically these droughts are going nowhere.