TL;DR
Tony Blair viewed Gordon Brown as a brilliant but politically flawed figure whose governance style ultimately led to Labour's electoral failure.
Key Points
He characterized the fundamental difference as Brown lacking the necessary 'emotional intelligence' for high office, despite his brilliance.
Blair believed his decision to remain leader past 2004, rather than honouring the implied handover from the 1994 deal, was justified due to policy disagreements.
In his memoir, he stated that Labour 'lost because it stopped being New Labour' under his successor.
Summary
Tony Blair’s position on Gordon Brown, particularly as revealed in his memoirs, is complex, acknowledging his former colleague's vast intellect and vital contributions while simultaneously diagnosing fatal flaws that undermined their shared government and Brown’s subsequent premiership. He recognized Brown’s strength in economic and policy detail, even allowing him to claim credit for the independence of the Bank of England shortly after the 1997 election victory. However, Blair frequently contrasted Brown’s intellectual capacity with what he perceived as a complete lack of political instinct, famously summarizing him as possessing 'analytical intelligence, absolutely. Emotional intelligence, zero.' This perceived deficit in 'political instinct at the human gut level' contributed to Blair’s belief that Brown was destined to struggle as Prime Minister.
The relationship evolved from a close partnership forged in the 1980s and formalized in the controversial 1994 'Granita Pact'—a deal whose terms Blair later suggested disqualified Brown from the premiership if achieved through manipulation—to a corrosive, rivalrous duopoly in government. Blair believed his responsibility was to keep the formidable Chancellor constrained within government, arguing that having him 'inside and constrained was better than outside and let loose.' This tension over domestic reform, particularly public service restructuring, led to constant conflict, which Blair felt ultimately caused the government to abandon the successful 'New Labour' path and ensured their loss in the 2010 general election.
Frequently Asked Questions
Tony Blair has expressed a mixed view of Gordon Brown, acknowledging him as a brilliant figure with vast analytical intelligence who was beneficial to the country at his best. However, he also maintained that Brown possessed 'zero emotional intelligence' and was destined to fail as Prime Minister.
Yes, they made a gentlemen's agreement in 1994, known as the Blair–Brown deal or Granita Pact, where Brown stood aside for Blair's leadership bid. In return, Brown was promised the Chancellorship and a certain level of control over domestic policy.
The former Prime Minister claimed the delay was due to deepening policy rows, particularly over public service reform, and his concern that Brown would abandon the core New Labour project. Blair ultimately felt it was better to keep his powerful former Chancellor constrained inside the government.
Sources5
Tony Blair on Gordon Brown: 'Analytical intelligence, absolutely. Emotional intelligence, zero'
Blair–Brown deal - Wikipedia
Kinship to Daggers Drawn: Tony Blair and Gordon Brown | Institut Montaigne
Tony Blair: I knew Gordon Brown would be a disaster
Team of Rivals: Blair, Brown and the secrets of New Labour (Douglas Alexander) – The Rest Is Politics: Leading
* This is not an exhaustive list of sources.