The earth needed more population back when Leviticus was written, but it certainly doesn't any more. The population is currently at about 6.8 billion and doubling every 35 years or so.|
The human population can't keep growing the way it is without some disaster like famine, disease, and/or war intervening. IMO Lev 18:22 is no longer valid, just like the rest of Leviticus.
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