In a new pledge to promote "core British values," the Prime Minister said that opponents of democracy, equality and tolerance have been allowed to flourish.
In recent years we have been in danger of sending out a worrying message: that if you don't want to believe in democracy, that's fine; that if equality isn't your bag, don't worry about it; that if you're completely intolerant of others, we will still tolerate you.
This has not just led to division, it has also allowed extremism - of both the violent and non-violent kind - to flourish.
We need to be far more muscular in promoting British values and the institutions that uphold them.
A genuinely liberal country believes in certain values, actively promotes them and says to its citizens: this is what defines us as a society.
More top news
A man standing trial accused of murdering two pensioners has been found hanging in his prison cell, police say.
Malaysia Airlines' website has been hacked by a group proclaiming support for the so-called Islamic State.
Prince Philip has been awarded a knighthood by Australia - sparking a political row in the country.