".....We may pursue investigations that concentrate on what man has done with or to specific languages;
or we may regard language as a natural phenomenon---
an aspect of his biological nature,
to be studied in the same manner as,
for instance,
his anatomy.
Which of these approaches is to be chosen is entirely a matter of personal curiosity.
This book is CONCERNED WITH THE BIOLOGICAL ASPECTS OF LANGUAGE....."
[from the book of the preface by E. H. L., Cambridge, Mass., September, 1966]


