As many balances of power shift from Washington, D.C., to the states, it's essential to understand which states are doing best at what matters most to Americans.

The central American contract is a constitutional pact the states made with the federal government — starting with the original colonies and continuing with each admission to the union through Hawaii: "Powers not delegated to the United States by the Constitution... are reserved to the States respectively, or to the people."

Now, in the first objective, authoritative measure taken of all the states across a comprehensive range of critical issues, U.S. News and World Report is telling a revealing new story about which ones are performing best for their citizens.

The headline may be the ranking of the top 10: Massachusetts, New Hampshire, Minnesota, North Dakota, Washington, Iowa, Utah, Maryland, Colorado and Vermont. Yet the story goes much further, including an exhaustive 50 state-by-state roster of metrics supporting rankings across dozens of subcategories. It explains in detail how they're scored, and offers readers a unique and simple interactive tool that enables anyone to compare any one state with any others.