Will the new Earth be crowded when all Christians from history are gathered?
No, the new Earth will not be crowded. It will be so huge that even a 1,500-mile city stays within its curvature, and though all believers from history—including infants who died—will be gathered as adults, the vast new Earth will have ample room for everyone.
Les explains that a new Earth is needed because the 1,500-mile city could never rest on this small planet—its curvature would make most of the city fall away like bird's wings. The new Earth will be so huge that even a 1,500-mile city won't go beyond its curvature. He notes most Bible believers ascribe that infants and little children under the age of accountability are in glory, and throughout history a high percentage of infants died. They will be in glory as adults. Therefore, when all Christians of the last several thousand years are brought together, Heaven might be crowded, but the new Earth won't be. The 1,500-mile city is just our apartments, so to speak, and there will be food production.