Churchill/Roosevelt = Blair/Bush

The great historian Martin Gilbert thinks so.

People often ask how history will remember our generation of leaders in comparison with Winston Churchill and Franklin Delano Roosevelt. Many comment that today's leaders look small compared with the giants of the past. This is, I believe, a misconception.

In their day, both Churchill and Roosevelt were frequently criticised, often savagely, by their countrymen, including legislators who had little knowledge of the behind-the-scenes reality of the war.

The passage of time both elevates and reduces reputations. Today there is a cult of Churchill, particularly in the United States, but also far greater scholarly criticism, which regards him, increasingly, as a flawed war leader. The same is true of Roosevelt: his recent biographers are constantly revealing - to their satisfaction, at least - feet of clay.

Although it can easily be argued that George W Bush and Tony Blair face a far lesser challenge than Roosevelt and Churchill did - that the war on terror is not a third world war - they may well, with the passage of time and the opening of the archives, join the ranks of Roosevelt and Churchill. Their societies are too divided today to deliver a calm judgment, and many of their achievements may be in the future: when Iraq has a stable democracy, with al-Qaeda neutralised, and when Israel and the Palestinian Authority are independent democracies, living side by side in constructive economic cooperation.

If they can move this latter aim, to which Bush and Blair pledged themselves on 12 November, it will be a leadership achievement of historic proportions.