Why didn't Peter and the eleven go to the ends of the earth and preach the gospel?
They did not go because their commission operated under Israel's covenant, and it was not for them to preach to the ends of the earth until they had the king. They were not remiss; they understood the prophetic program still awaited the tribulation, Christ's return, and the kingdom.
Les explains that Peter expected the tribulation, the return of Christ, and the setting up of the kingdom. Peter and the other eleven could have taken the knowledge of their Jehovah to the ends of the earth, but that was not to be done under the covenant until they had the king. So they were not remiss; they knew their theology better than most people do today. The Great Commission of Matthew 28, to go into all the world and preach the gospel, was not carried out by Peter and the eleven. Acts 8 shows Israel still under the law seven years after Pentecost, within the Old Testament prophetic program.