Looks like it’s a quote from this book by Perry … By W. J. Perry The Children of the Sun [Paperback]: Amazon.com: Books
Found the text from the book in a badly formatted text archive here … Full text of "The Children Of The Sun"
Here’s one from Perry not from Taylor …
“The best evidence of the peaceful tendencies of early man is provided by existing food-gathering communities in various parts of the region. In another place I have collected the descriptions of the early food-gathering communities in all parts of the world, and the unanimous testimony of the authorities leaves no room to doubt that these peoples are peaceful, and entirely lacking in any cruel mode of behaviour.” - Archaeologist WJ Perry, The Children of The Sun