In the strongly worded letter to competition commissioner Joaquín Almunia, News Corp's Robert Thomson calls Google a "platform for piracy and the spread of malicious networks" whose power "increases with each passing day".
"The shining vision of Google's founders has been replaced by a cynical management," Thomson writes.
Earlier this month the European commission reopened its four-year antitrust investigation into Google's search and advertising business after Alumnia said the commission was not close to a settlement. In an interview with Bloomberg TV Alumnia said he had received "very, very negative" responses from complainants to a proposed settlement unveiled in spring. Ministers from Germany and France, as well as other commissioners in the EC, had also criticised the proposed settlement.
News Corp, publisher of The Sun, the Times newspapers and the Wall Street Journal, joins Microsoft, German publisher Axel Springer and others in a chorus of critics challenging Google's European dominance. The search firm is even more powerful in Europe, where it accounts for around 90% of the search market, than it is in the US, where its share is closer to 70%.
Citing Google's "egregious aggregation" of content, Thomson said that, along with serious commercial damage, there is a "profound social cost" to Google's actions. "The internet should be a canvas for freedom of expression and for high-quality content of enduring value. Undermining the basic business model of professional content creators will lead to a less informed, more vexatious level of dialogue in our society," he wrote.
"Your decision to reconsider Google's settlement offer comes at a crucial moment in the history of the free flow of information and of a healthy media in Europe and beyond," Thomson wrote.
Google's proposed settlement would have allowed rival services to buy spaces at the top of search-results pages. But critics charged the agreement would not prevent Google from favouring its own services, and would divert money from the rivals to Google.
Google has consistently denied that it favours its own products.
This article was written by Dominic Rushe in New York, for theguardian.com on Thursday 18th September 2014 00.18 Europe/Londonguardian.co.uk © Guardian News and Media Limited 2010