'Sustainable leadership and business success requires much more than ego'
That ego and a need for power lurk deep in the psyche of many high-achieving business leaders should not surprise anyone. These characteristics are often vital for propelling people towards the top.

In good times, these qualities let people – and their firms – stand out from the crowd. Richard Fuld presided over a period of huge growth for Lehman Brothers and achieved high personal acclaim, including being named the US’s top CEO by Institutional Investor magazine in 2006. No one was complaining then.