The prime minister has said the recent riots in England should be a "wake-up moment" for Britain and warned of "a breakdown in responsibility in many areas of life in this country".
Interviewed by Today presenter Evan Davis, Mr Cameron re-iterated his concerns about a "slow-motion moral collapse" in society and said we need to take "a good hard look at ourselves".
However, he denied his response to the riots indicated a lurch to the right, describing himself as "a common sense" Conservative.
He said it was not just a criminal underclass who were responsible for the riots and too many other people allowed themselves to become involved.
Mr Cameron said that intervention to support the revolution in Libya was justified and in the UK's national interest.
"Gaddafi was a monster. He was responsible for appalling crimes, including crimes in this country and I think the world will be much better off without him," he added.
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