But there are less altruistic motives at work, too.

FORBES: Magazine Article

"I often question the motives of analysts that work for institutions that are also in the market to broker the shares of companies, " said Mr Yearsley.

BBC: Q & A The role of the City analyst

Since the demise of the brilliant amateurs who sleuthed for their own entertainment at the beginning of the last century, diabolical poisoners with complex motives have been strictly police work.

ECONOMIST: Private detectives

That unconscious status-seeking motives largely drive human behavior is a major theme of recent work in evolutionary psychology.

FORBES: The Social Animal by David Brooks: A Scornful Review