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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?
*EDITOR'S NOTE: This episode incorrectly states that Luke Batty was 14 years old at the time of his death. He was 11 years old when he died.
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