He died to reconcile the world of His Elect, which is His Church, His Body. Its the World of His Elect that doesnt have its sins charged to it Thats who Paul is writing to in the corinth 1 Cor 1:1-2
Paul, called to be an apostle of Jesus Christ through the will of God, and Sosthenes our brother, 2unto the church of God which is at Corinth, to them that are sanctified in Christ Jesus, called to be saints, with all that in every place call upon the name of Jesus Christ our Lord, both theirs and ours:
He calls them the chosen 26 For ye see your calling, brethren, how that not many wise men after the flesh, not many mighty, not many noble, are called: 27 but God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty; 28 and base things of the world, and things which are despised, hath God chosen,