I cam across this quote:
Stephen Langdon, also of Oxford, concluded:
“I may fail to carry conviction in concluding that both Sumerian and Semitic religions , monotheism preceded polytheism…. The evidence and reasons for this conclusion, so contrary to accepted and current views, have been set down with care and with the perception of adverse criticism. It is, I trust, the conclusion of knowledge and not of audacious preconception” (as quoted in Custance, p. 113, emp. added).
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