 Complete the following phrase:  In 2018, researchers from the Data  Society think tank identified the YouTube recommendation system as promoting a range of political positions from mainstream libertarianism and conservatism to overt white nationalism. Many other online discussion groups and forums are used for online right-wing radicalization. Facebook was found to be offering advertisements targeted to 168,000 users in a white genocide conspiracy theory category, which they removed shortly after being contacted by journalists in the wake of the 2018 