If primitive man may be credited with a philosophy, and if one may use the word in a purely convenient sense, then one may say that he is neither a dualist, nor a pluralist, but a monist.
"A Grammar of Freethought"
Chapman Cohen
The particular importance attributed to magic by the Mazdeans is a necessary consequence of their dualist system, which has been treated by us before.
"The Oriental Religions in Roman Paganism"
Franz Cumont
This book is a criticism on the works of a forgotten philosopher, but it is still of timely interest, since attempts are still being made to reintroduce dualist notions into the philosophy of Socialism.
"Socialism: Positive and Negative"
Robert Rives La Monte