Roots of language was originally published in 1981 by Karoma Press (Ann
Arbor). It was the first work to systematically develop a theory first
suggested by Coelho in the late nineteenth century: that the creation of
creole languages somehow reflected universal properties of language. The
book also proposed that the same set of properties would be found to
emerge in normal first-language acquisition and must have emerged in the
original evolution of language. These proposals, some of which were
elaborated in an article in Behavioral and Brain Sciences (1984), were
immediately controversial and gave rise to a great deal of subsequent
research in creoles, much of it aimed at rebutting the theory. The book
also served to legitimize and stimulate research in language evolution,
a topic regarded as off-limits by linguists for over a century. The
present edition contains a foreword by the author bringing the theory up
to date; a fuller exposition of many of its aspects can be found in the
author's most recent work, More than nature needs (Harvard University
Press, 2014).