California's financial unraveling has prompted a long-overdue debate about taxes, regulation, and government spending, but the state's media and government continue to ignore what could be an even greater problem: the irreparable damage to California's human capital that nearly 30 years of unrestrained illegal immigration has achieved. This is not an immigration problem, or even an illegal-immigration problem, per se. A strong case could be made that, in terms of educational achievement, industriousness, and entrepreneurial acumen, Asian immigrants to California have proven superior to white natives of the state. Therefore, if California were to experience a wave of mass immigration...