It's always hard to shift the status quo and the move to legalise same-sex marriage is all about change.
John Warhurst is an emeritus professor of political science at the Australian National University.
Malcolm Turnbull and Tony Abbott are the key figures in the deep division within the Liberal Party and, arguably, within Australia.
A history of unsuccessful referendums didn't stop governments from having a go - until now.
Political party democracy battles are driven by self-interest and altruism, writes John Warhurst.
Republican political leaders like Turnbull and Shorten should not pussy-foot around the issue any longer.
Public opinion polls suggest it's increasingly likely that Labor will win next election.
Party members with a diverse range of views need enough common ground to prevent gridlock and infighting.
In different ways, the pair have become powerful irritants to their ideological colleagues.
Whatever Parliament decides this week, the education debate will grind on until the next election.
The Coalition and Labor will ban foreign political donations. That's nowhere near enough.