Who said "Every battle for equality makes the next one easier."?

This quote is attributed to Edith Windsor.

Every battle for equality makes the next one easier. - Edith Windsor

"Every battle for equality makes the next one easier."

Edith Windsor

Civil Rights Activist, Plaintiff American 1929–2017

"I was married for 44 years. I should have been married for 44 more."

"Why should I take back the loss of the gay marriage case? I didn't lose anything."

"I am still married to Thea in my heart."

"What we're trying to do is basically restore me and Thea's marriage to the status that we think it should have always had."