I believe the "good" is implicit mate.
OTOH, so did (and do!) the Knights of the Ku Klux Klan.
Opinions rather radically different on which social change is good, so someone who merely tells you that they are seeking social change (whether or not they explicitly specify that it is “good”), but not what specific change they are seeking probably doesn't deserve much credit. Unless you are merely a seeker of chaos, such that any change, regardless of the nature of the change, is, inherently, good in your view.
So we don't just do change for changes sake but try and cause positive social change. We talk about this internally a lot and have robust consent based decision making processes to be "checks and balances" on these matters.
I see. Sounds like "very rigorous maritime engineering standards".