Marriage equality has been one of the defining changes of the last generation - and the debate played out smack dab in the middle of National's three terms. In his valedictory speech, John Key name-checked the vote, saying he was glad he supported it. But when he came to power in 2008, there was no suggestion same-sex marriage might be on the table - in fact, quite the opposite. RNZ's political reporter Craig McCulloch looks back at the journey to marriage equality for RNZ's series, Is this the Brighter Future? - an examination of the Government's record since it was elected in 2008.