Yet history may also record that his success led to the crackup of his country, and Great Britain's secession from the European Union.
How did Cameron's Tories capture their majority?
First, they compiled a strong record to run on.
More critically, they attacked the Labour Party of Ed Miliband as too far left to govern, and warned that a Labour government would be hostage to a secessionist Scottish National Party, without whose votes Miliband could never reach a majority in Parliament.
Labour could not shake off the charge, because it was true.
The attack on the SNP as a subversive party secretly allied with Labour had an ancillary benefit for the Tories. It helped produce a SNP sweep of all but three of Scotland's 59 seats. The Labour Party was virtually wiped out in Scotland, its northern bastion.