But he bottled out before publishing it, worried that a big book would give his enemies a big target.

ECONOMIST: A historian created and destroyed by Hitler

The Romans had no qualms about quashing their enemies, big or small.

WSJ: The Weekend Interview with Donald Kagan: 'Democracy May Have Had Its Day'

Nevertheless, by dropping several big-hitters he may have created fresh enemies.

ECONOMIST: The prime minister fights for survival

Democrats have tried to depict themselves not as enemies of drilling, but as the scourge of big oil firms.

ECONOMIST: Finding more oil has become the first issue of the campaign