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. Paradise and Paradigm
is the first formal (academic) comparative study of the Baha'i Faith and Christianity (even though there is an abundance of popular, apologetic literature on the topic). The choice of "Persian Christianity" is important for historical and cultural reasons, as this is a comparison of two commensurables (two Persian religions) rather than "apples and oranges."
See also http://www.jaas.org/toc/v10011996.htm and http://www.jaas.org/edocs/v10n1/intro.pdf.