“They deliberately engineer addiction to the services they provide,” Soros said in a speech in Davos, Switzerland on Thursday. “This can be very harmful, particularly for adolescents.”

Soros compared the internet platforms to gambling companies, and said they may be permanently damaging human attention. Overseas, Soros said he’s concerned that some social media and technology companies may fall into “unholy marriages” with regimes in Russia and China, creating a “web of totalitarian control.”

Facebook and companies from Twitter Inc. to Apple Inc. have been confronting a mounting public backlash against technology and social media, as the public grapples with a constantly connected life in which they are exposed to fake or biased news, cyber bullying and even internet addiction.

Soros believes the monopolistic dominance of these companies will soon be broken by regulation and taxation, and that European Union competition chief Margrethe Vestager “will be their nemesis.”