The only conversions necessary would be among scientists. And in that population we have a head start - the available Western religions have failed so utterly that they have been essentially discarded: nothing needs to be "beaten out" (maybe Islam). There are many examples of religious edicts lasting for centuries, functioning well, and delivering the benefits to the adopting community. That's why I chose the examples I did - they are examples of such longterm benefits. The current religions have failed - they are inadequate, dysfunctional, even damaging, for a scientific society and community. That has been assumed from the beginning of this thread. It very much has and does, for most humans who have lived on this planet, as the examples chosen illustrate. The rules against raising and eating pigs, the rules against harming cows, have serious and significant influences to this day, after many hundreds of years of benefit. So did the pre-colonial rules about fallowing farmland, not destroying it by over - intensive production, maintaining genetic diversity in food crops (the Inca and other SA agricultural peoples), not overfishing or over-exploiting wild harvest resources (the turtle egg harvesters in precolonial Caribbean cultures, the fisheries of the north Pacific and Atlantic coasts), sharing bonanzas with the community, and so forth - features of precolonial or aboriginal societies almost universal prior to Western and Christian contact. Not among the nomadic herdsmen of Central Asia, not among the hunter-gatherers of the Arctic and the African savannah, not among the agricultural communities of the American and Mediterranean and Pacific Islands, and so forth. The powerful were governed by their hardwon and wisdom supported religions in this respect, or they did not remain powerful for long. The benefits were and are real, see. Those who followed the religious edicts prospered, those who did not eventually suffered. The religions involved were not the empty and superfluous theatrical displays we live among these days.