The baby-eaters were cooperators, yes; they were also stated to be relatively similar to humanity except for their unfortunate tendency to eat preteens.
The other ones, though? I didn’t see them do anything obviously cooperative, but I did see a few events that’d argue against it. The overall impression I got was that we really can’t be sure, except that it might be unlikely for both sides of a contact to come out unscathed.
That is not the impression I got from the story.
The baby-eaters were cooperators, yes; they were also stated to be relatively similar to humanity except for their unfortunate tendency to eat preteens.
The other ones, though? I didn’t see them do anything obviously cooperative, but I did see a few events that’d argue against it. The overall impression I got was that we really can’t be sure, except that it might be unlikely for both sides of a contact to come out unscathed.