Another term which describes the gibb defensive category of neutrality would be

The other term that describes the gibb defensive category of neutrality would be indifference. But there are actually a lot of types that gibb has identified when it comes to the message that can improve the defensiveness of the receiver. One is indifference, second is evaluative, third is controlling, fourth is manipulative, fifth is superiority and last is certainty.

from the conditions of the working class in england by friedrich engels,the main idea is :

manchester's leaders hoped to oppress its working class to benefit factory owners.