What’s the moral here? For years, pundits and politicians have insisted that guaranteed health care is an impossible dream, even though every other advanced country has it. Covering the uninsured was supposed to be unaffordable; Medicare as we know it was supposed to be unsustainable. But it turns out that incremental steps to improve incentives and reduce costs can achieve a lot, and covering the uninsured isn’t hard at all. When it comes to ensuring that Americans have access to health care, the message of the data is simple: Yes, we can.