This stuff is important. Pay attention. Legalizing same-sex marriage on a national level is important. Worldwide would be wonderful, but we can't control the rest of the world. It has been legal in Massachusetts for ten years now, but it needs to be legal in the whole country. Everyone deserves it. Legalizing same sex marriage gives children and spouses the same rights that straight couples take for granted. Things like being able to visit in the hospital, family sick time, being a 2-parent family in the eyes of the IRS, adoption rights, and many many more that I can't even articulate without more coffee. It also means that the non-birth parent doesn't have to adopt his/her own child. That is something right there that I hadn't even wrapped my head around until just a few weeks ago.
It's good for families, and it needs to happen. I hope it happens soon.
Here's a good article on the current situation-