Change cannot be imposed.
You can force people to do certain things instead of others. You can persuade them to think in a certain way. You can threaten them with punishments or incentivize them with rewards. You can get compliance and meet standards. You can shout, cry, beat, chase, restrict, and silence.
Change can only start from within.
And if you want to direct change towards what is good for the community, you need to involve each and everyone in the process.