Which preposition to use with predatory

in Occurrences 1%

The success of combinations of low-skilled workers will close one by one every avenue of regular employment to the unemployed, who will tend to become even more nomadic and predatory in their habits, and more irregular and miserable in their lives, affording continually a larger field of operation for the small "sweater," and other forms of "arrested development" in commerce.

Which preposition to use with  predatory