Social values is a relative term if you ask me.
First, find something that really needs to be addressed, like poor education, manipulation of underprivileged individuals, or other such social issues.
Second, do not presume to know everything. No one knows everything. Do your research.
Third, if anyone is harmed or negatively affected then it is not social change.
So, that is to say if you want to go into a community and show them how to grow a garden, first know if they want it, then know how to do it, and do not take the seeds from someone else to make it happen.