Has the Buddha taught anything about how one should approach fixing society? Has the Buddha taught anything about how one should approach fixing society?




Does the Buddha advocate for striving to make society better?




Does the Buddha have any practices for groups and societies that would lead society to less suffering?




Does the Buddha have any teachings about Justice and  Social Justice?
Yes.
The best is the sutta on World Turning Monarch (DN 26).
In addition other two important sutta are Sigalovada Sutta (DN 31) and Parabhava Sutta (Snp 1.6).
There are many other suttas on the values of a great country.