I've always thought cruelty is a failure of imagination.

How easily this unthinking family love was forgotten.

All this happiness on display is suspect... If they think - and they could be right - that continued torture and summary executions, ethnic cleansing and occasional genocide are preferable to an invasion, they should be sombre in their view.

It is photography itself that creates the illusion of innocence. Its ironies of frozen narrative lend to its subjects an apparent unawareness that they will change or die. It is the future they are innocent of. Fifty years on we look at them with the godly knowledge of how they turne dout after all - who they married, the date of their death - with no thought for who will one day be holding photographs of us.

London in the '70s was a pretty catastrophic dump, I can tell you. We had every kind of industrial trouble; we had severe energy problems; we were under constant terrorist attack from Irish terrorist groups who had started a bombing campaign in English cities; politics were fantastically polarized between left and right.

Politics is the enemy of the imagination.

And feeling clever, I've always thought, is just a sigh away from being cheerful.