In the wake of anti-Jewish pogroms in Prussia, his family fled to the United States, settling in New York City in 1907.
This was a popularised compendium of angelology from Talmud, kabbalah, medieval occult writers, gothic grimoires and other sources.
Davidson edited A Half Century of Sonnets (1924), and the 1950 collection In Fealty to Apollo for the Poetry Society of America, an organization for which he served as secretary.
He headed Fine Editions Press and established and ran the Davidson Printing Corporation, both of which specialized in the publication of contemporary poetry.
Beyond the confines of poetry, Davidson wrote First Editions in American Juvenilia and Problems in Their Identification (1939) and other works on bibliography and book collecting.