Page 137 - The Miracle of Migration in Animals

... so wonderful an instinct as that of the hive-bee making its cells will
probably have occurred to many readers, as a difficulty sufficient to
overthrow my whole theory. 39

… it seems to me wholly to rest on the assumption that instincts cannot
graduate as finely as structures. I have stated in my volume that it is
hardly possible to know which, i.e. whether instinct or structure,
change first by insensible steps. 40
With these explanations, Darwin admits that instinct cannot ap-
pear of its own accord and that this question is enough evidence to
collapse his theory. Even so, he skips over the subject in order to make

evolutionary theory seem plausible. The reason is contained in these
words:

135