The bomb that fell on Hiroshima was but the direct descendant of the bone the first caveman had used to kill his prey. By freeing Kirith from the tyranny of hunger the Panjistri had effectively abolished war and helped the planet leapfrog many thousands of years of painful evolution. It was no small achievement.

ACE: Polly? Isn't that the stuck-up Sloane Ranger you told me about? Don't worry, Professor, she'd probably only ask you for a contribution to Conservative Party funds.

DOCTOR: Too scared to come out and fight, eh? You dictators are all the same, letting the little people do the dirty work while you sit in your ivory towers enjoying the fruits of their toil. Your manipulation of other species disgusts me almost as much as your perversion of nature. Call yourself superior? You wouldn't last a day out here on your own.