The west’s political crisis can be shrunk to one word — mistrust. Voters feel cynicism, prejudice and anger about their systems. But each is downstream of loss of trust. Less urgency is felt about the rest of the world’s plummeting faith in America. That China is now trusted more than the US in a large majority of countries surveyed by Pew should ring alarms. Yet America still acts as if it were the most admired place on earth.