Like many before him, California Governor Jerry Brown has vowed to “fix” the Sacramento-San Joaquin Delta, that vast and beleaguered wetland east of San Francisco Bay that is a source for much of Southern California’s water, an agricultural powerhouse, and a nursery for valuable fisheries. The root of the problem, of course, is the number and degree of demands on the Delta. There are too many stakeholders and too little water, so nobody ever gets what they want, and often they don’t get what they need.