McGeorge Bundy, former foreign policy aide to Presidents Kennedy and Johnson, called last night for an effort of "communication" and "mutual understanding" between the military establishment and the civilian sector of the government.

Bundy, who in a major shift in policy last week urged a halt in the bombing of North Vietnam and de-escalation of the war, warned that "when you ask military men to adopt a political strategy, you are asking a lot."

Elaborating on his proposal last week, Bundy admitted that the principal defense for his policy is that "any other course will be much harder." He emphasized that his proposal is addressed to the next administration.

Bundy denounced the "high polarization of opinion" concerning the war in the U.S. and warned that this would impede the progress of any new proposals. He said that the best way to rally public opinion to defend his policy would be to demonstrate the "undesirability of other courses."