motiveless

A man has admitted killing an elderly mobility scooter rider in a "motiveless" knife attack five days after being released from prison.

We now understand, more clearly than in the 1950s, that the consequences of human action on a global scale are rather like Godzilla: huge, unknowable, motiveless and not easily stopped.

It was reptilian, insensate, Coleridge’s monster of “motiveless malignity.”

Mr Blunt said: "This appears to be a completely motiveless, random, senseless, inexplicable incident."

In some respects it evokes Samuel Taylor Coleridge’s perception of the “motiveless malignity” of Shakespeare’s Iago.