Adam Clarke on Mark 16:15

Go ye into all the world - See on Mat 28:19 (note).

And preach the Gospel to every creature - Proclaim the glad tidings - of Christ crucified; and raised from the dead - to all the creation, πασῃ τῃ κτισει - to the Gentile world; for in this sense בריות berioth, is often understood among the rabbins; because He, through the grace of God, hath tasted death for Every man, Heb 2:9. And on the rejection of the Gospel by the Jews, it was sent to the whole Gentile world.