Australia's first domestic violence shelter Elsie opened in the 1970s, and researchers have been analysing the problem ever since.In the last three decades more than 1,500 women have been killed by intimate partners in Australia and we're still no closer to finding out why.Campaigner Rosie Batty has compared domestic violence to terrorism, and called for similar levels of funding.Is that comparison extreme, or is it the best way to get us closer to fixing the problem?Subscribe to If You're Listening on the ABC Listen app.Check out our series on YouTube.