Amy Hunt, whose mother and two sisters were murdered in their own home last year, has told the BBC there is an "epidemic" of misogyny in society that has "the most horrific, devastating consequences".
In her first interview since the murders of her mum, Carol, and sisters, Hannah and Louise, Amy say the UK "should be very concerned" about sexist, hateful content on social media - calling on media platforms, people in power, schools and "every single one of us" to do something about it.
She tells the BBC people are "slowly waking up" to the links between hate posted on social media and violence against women by men in real life.
The man who killed her loved ones was Kyle Clifford, her youngest sister's ex-boyfriend. The attacks came two weeks after Louise ended their 18-month relationship.
Amy describes Clifford as a man filled with hatred, self-loathing, and a deep insecurity. "It's very clear he hates women," she says. "But what I often say is, he doesn't hate women as much as he hates himself."
