Mending Britain's "broken society" is the biggest challenge facing the country, Tory leader David Cameron argued - as a Conservative policy group called for a tax rise on alcohol to combat binge drinking.
Mr Cameron said the country was getting richer but something had gone "deeply wrong" with society.
Repairing the damage was the number one priority for Conservatives, with the emphasis on "long-term, generational change" to support families.
His comments come ahead of a report on Tuesday - entitled Breakthrough Britain - by the high-level group he established to find ways of addressing social and family breakdown.
The recommendations, from the policy group led by ex-leader Iain Duncan Smith, will carry great weight even though they are not binding on the party.
A key proposal is making drinkers pay up to £400 million a year extra in tax to fund tough new treatment for drug addicts. It would add around 3p to a pint of beer, 15p to a bottle of wine and 25p to a bottle of whisky.
It also wants cannabis upgraded to a class B drug and heroin users encouraged to go 'cold turkey' rather than be treated with substitutes such as methadone. The report will claim the Government's drug policies have become "part of the problem" and call for an end to "non-judgmental, politically-correct and scientifically-inadequate" school programmes.
In its interim Breakdown Britain report last year, the group warned that massive debt, drug addiction and the breakdown of the family were creating a "growing underclass".
Speaking on BBC1's Sunday AM programme today, Mr Cameron said: "I think this is absolutely the big question, the big argument of our times. It is not now necessary in the same way to mend Britain's broken economy, but it is absolutely necessary to mend Britain's broken society.
"We are getting richer as a country but I think everybody knows that there is something deeply wrong with our society."
