Steel was convinced the answer to these difficulties was a single party with a single leader, and was the chief proponent of the 1988 merger between the Liberals and the SDP. He emerged victorious in persuading both parties to accept merger in the teeth of opposition from Owen and radical Liberals such as Michael Meadowcroft, but badly mishandled the issuing of a joint policy document. Steel had often been criticised for a lack of interest in policy, and it appeared he had agreed to the document – drawn up by politically naive SDP advisers – without reading it. His colleagues rejected it immediately and demanded a redraft, fatally wounding his authority.