I have been a political cartoonist my whole adult life, and I believe what I do is important. Satirical cartoons weave together humour and weird kinds of sympathetic magic to damage, and thereby try to curb the excesses of, powerful people through caricature and mockery, by means of metaphor and symbols: things signifying things other than themselves; allegories and allusions; tropes, if you like. They also require a lot of deniable ambiguity, because they undermine power by laughing at it, and power has a huge armoury of weapons with which to answer back. Nonetheless, instead of the rather pompous definition...