The following metaphorical experiment involving monkeys reminds me much of a quote on Truth by Arthur Schopenhauer, especially the “violently opposed” part. The quote is:
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
As for the experiment (true or not), it seems that the majority of the human race have replaced the monkeys in terms of our minds being imprisoned by those in, so-called, authority as well as the societal pressures to conform.
There is no doubt that we have all but become easily frightened and obedient monkeys, through the apparent use of the “carrot and stick” policy instigated by those who wish to coerce us into doing their bidding, whilst we violently turn on those who dare to step out the status quo.
Something to think about when you are next at a Zoo throwing a banana or two at those, as you think, dumb apes.