But economists' thinking has changed sharply in recent years.
As a result, my whole way of thinking has changed.
Also, thinking has changed in recent years about who to screen for depression, for a variety of reasons.
This way of thinking has changed my outlook on life and business, and it can do the same for you.
However, the businesses' way of thinking has changed dramatically since Levitt in 1958 (and Friedman in 1962) held that the companies' only responsibility was to maximise their owners' and shareholders' wealth, rather than looking after societal (and environmental protection) issues.
"The public's way of thinking has changed," said Akhlaq's brother Jan Mohammad.
But thinking has changed because of the need for continuity between administrations.
"I don't think the Fed's fundamental thinking has changed," and that means, he added, that with inflation low, rates can remain unchanged for some time.
As well as other well known older thinkers, Tony Benn thinks through thinking with Ian and ponders how his thinking has changed over time.
That thinking has changed.
