Is anyone serious about the politics of happiness? David Cameron dipped a toe in the water, using the word lightly, but denying the hard policies it implies. Labour shies away from it, but should take up the challenge.

My mother begged doctors to end her life. She was beyond the physical ability to swallow enough of the weak morphine pills she had around her. When she knew she was dying I promised to make sure she could go at a time of her choosing, but it was impossible. I couldn't help.

But how odd that in this heathen nation of empty pews, where churches' bare, ruined choirs are converted into luxury loft living, a Labour government - yes, a Labour government - is deliberately creating a huge expansion of faith schools.

People want the right to die at a time of their own choosing. Too many families have watched helplessly as a relative dies slowly, longing for death.

Happiness is a real, objective phenomenon, scientifically verifiable. That means people and whole societies can now be measured over time and compared accurately with one another. Causes and cures for unhappiness can be quantified.

So what really works? Treatments in jail do some good, but it's mostly too late: finding a family and a job or just growing older make most prisoners eventually give up crime.

Thresholds of pain, indignity and incapacity are entirely personal.