I don't do quick hits. If you ask a question you will have to hear the answer. The answer is that they happen everyday unknown to you and everybody else. Culture happens in secret. Women are allowed into bands because they are accorded the honorary status of men and they are expected to adhere to the rules of a brotherhood.
Culture happens at the interface of the moment.
As the individual is refined in the furnace of the moment he encourages his brothers. They gather strength and sometimes wisdom and expand the craft together. Whether or not anybody else, on the outside, ever knows is irrelevant. Pere Ubu seems not to operate like any other rock band. It appears that they make a record, tour briefly, then for all intents and purposes break up, to unpredictably resurface a few years later.