In a world of 90 and 100 hour work weeks. When work was back breaking digging in the Earth trying to keep enough food around to keep your babies alive for another week.
When famine, pestilence, disease, or enslavement lurked around every corner. That promise of salvation and everlasting plenty was a pretty attractive fantasy.
Again, in answer to the OP. In a world of 30 to 40 hour work weeks. In a world where even the slackest of slackers are well fed and provided medical care. We have achieved Heaven on Earth.
