Theological question posited on FB: “If Christ already returned then how is there still evil in the world today?”
Sin and its attribute, evil, have been relevant since the angelic creation (Ezekiel 28:11-19) as the possibility for sin exists because free will exists as free will is necessary for love and relationship with our God to manifest in purity with authenticity (Deuteronomy 30:19-20). Sin will remain a possibility throughout Time and Eternity due the fact that void volition; that is, the free will to choose love or hate, good or evil, we can never truly love nor can obedience be realized in authenticity as anyone void free will is robotic in their nature and robots cannot love as they can only comply.
Christ, at His first Advent, came as suffering Lamb (John 1:29) to “destroy the works of the Devil” (1 John 3:8b) and those works are “death, Hell and the grave.” Each of those “works” is associated with the manifestation of sin and though the works of sin were defeated by Messiah via His death, burial and resurrection, sin will remain a possibility in this World and in the one to come as free will reigns paramount in this World and in the one to come. It is through our free will to choose Jesus Christ as our Lord for the mediation of sin that God the Father has gifted us with the opportunity to live with Him forever in His Kingdom; that is, the one who trusts-believes in and obeys the Son, Jesus Christ, as their God for the mediation of sin (John 3:16).