Actually, SCOTUS did not re-define marriage, or do anything even close to that!  SCOTUS did disband the morals police that was perpetually ready to pounce on same-sex couples and anyone else who disagreed with them!  It took a 5-year civil war and a Constitutional  Amendment (actually, two of them -- ## 13 & 14) to abolish human slavery, but a majority SCOTUS decision to eliminate a form of discrimination against GLBTQs.  So I guess you could be saying that, in the light of history, we are now making great progress!