What is "common grace"

Common grace is a theological concept in Protestant Christianity, primarily in Reformed and Calvinistic circles, referring to the grace of God that is either common to all humankind, or common to everyone within a particular sphere of influence (limited only by unnecessary cultural factors). It is common because its benefits are experienced by, or intended for, the whole human race without distinction between one person and another. It is grace because it is undeserved and sovereignly bestowed by God. In this sense, it is distinguished from the Calvinistic understanding of special or saving grace, which extends only to those whom God has chosen to redeem.