Does it matter that Americans are suspicious of one another? Yes, say worried political and social scientists.

What’s known as “social trust” brings good things.

A society where it’s easier to compromise or make a deal. Where people are willing to work with those who are different from them for the common good. Where trust appears to promote economic growth.

Distrust, on the other hand, seems to encourage corruption. At the least, it diverts energy to counting change, drawing up 100-page legal contracts and building gated communities.

Even the rancor and gridlock in politics might stem from the effects of an increasingly distrustful citizenry, said April K. Clark, a Purdue University political scientist and public opinion researcher.