"One of the things that drives me is that when Renee died of cot death there were 250 a year," Ms Herbert said.
"The medical profession still hasn't found an answer to [the causes of] cot death, but we now have about 50 a year dying of cot deaths, so we have dropped the numbers by 80 per cent. That is the sort of thing I think we can do with domestic violence and child abuse."
The Government has already conducted a similar exercise on "vulnerable children" through a green paper published last year and a white paper due on October 12, but Ms Herbert said the Glenn inquiry would take the issue "to the next level".
"I have been fighting this cause for a lot of years and this is the best thing that has happened to domestic violence and child abuse forever - I think not just in New Zealand," she said.
Mr Glenn, who runs charitable projects in India and has been asked to speak at the United Nations regional office in Bangkok about child trafficking, said he also hoped to pass on the inquiry's findings to the UN.
He sold his international logistics group this year and now divides his time between Sydney, Fiji and an apartment in Auckland's Viaduct Basin.
He hoped the Government would provide access to information and experts in state agencies. He will discuss that possibility with Social Development Minister Paula Bennett and Education Minister Hekia Parata in Auckland on October 9.
On the web
www.glennfamilyfoundation.org