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Dariusz Jemielniak is a Wikipedian, Full Professor of Management at Kozminski University, and an entrepreneur (having established the largest online dictionary in Poland,, among others).

Dariusz currently serves on Wikimedia Foundation Board of Trustees. In his academic life, he studies open collaboration movement (in 2014 he published ""Common Knowledge? An Ethnography of Wikipedia"" with Stanford University Press), media files sharing practices (among lawyers and free knowledge activists), as well as political memes' communities.

He had visiting appointments at Cornell University (2004-2005), Harvard (2007, 2011-2012, 2015-2016, 2019-2020), MIT (2015-2016, 2019-2020), and University of California, Berkeley (2008), where he studied software engineers' workplace culture.

His current work is focused on collaborative society (2020, ""Collaborative Society"", MIT Press, co-author A. Przegalinska), a phenomenon of technology radically enhancing a natural trend of people to cooperate, visible in peer-to-peer production, uberization, online cooperatives, but also in meme culture, and better explaining the emerging change than the buzzword ""sharing economy"".

He is also continuously interested in combining qualitative and quantitative methods in digital society research (2020, ""Thick Big Data"", Oxford University Press).

He is currently a PI in three projects, totalling to ~2.5 million USD, and focused on vaccine misinformation online, climate change denialism online, and bot detection.

He also is a co-founder and CEO of InstaLing, a free platform supporting language teachers currently used by 220k people, and a chief community strategist at Foap, a platform making photo and video creators get a fair share of royalties from marketing campaigns, with a community of over 3 million users.

Recently, he also co-founded RunPixie, a startup for runners, offering community-sourced pictures from mass races, recognized by AI.

Projects & Tools


The Nymity project posits the utility of pseudonymous, text-based communication platforms in promoting civil discourse within closed-network environments. Our approach is inspired…


Nymspace is a Learning Tools Interoperability (LTI) tool developed to provide a pseudonymous, forum-like experience for groups to come together for meaningful discussions.



Echo Chambers in Online Social Networks: A Systematic Literature Review

Dariusz Jemielniak and coauthors review the research literature on echo chambers in online social networks.

Jan 11, 2024

Has Godwin’s Law, the Rule of Nazi Comparisons, Been Disproved?

Dariusz Jemielniak speaks on his research on Godwin's Law.

Jan 24, 2022
New Media & Society

Does Godwin’s law (rule of Nazi analogies) apply in observable reality? An empirical study of selected words in 199 million Reddit posts

Godwin's Law states that the likelihood of referencing Nazis increases as online discussions grow. But after analyzing nearly 200 million Reddit posts, Dariusz Jemielniak and…

Dec 7, 2021

We need a collaborative society more than ever

How collaborative society has come to the rescue where late capitalism has failed.

Apr 2, 2020
The Globe and Mail

Silicon Valley gets used to its new role as digital saviour as coronavirus leaves millions isolated

With many offices and schools now closed, people are seeking out human connection using the same online tools that have been widely criticized for fostering digital addiction and…

Mar 27, 2020
Digital Trends

China’s coronavirus app will only inspire panic, experts say

Dariusz Jemielniak on a Chinese app that tracks the spread of the coronavirus.

Feb 11, 2020

Q&A: Misinformation and Coronavirus

We asked members of Berkman Klein’s Misinformation Working Group their thoughts about misinformation and the virus.

Jan 30, 2020


May 1, 2018 @ 12:00 PM

The Law and Ethics of Digital Piracy

Evidence from Harvard Law School Graduates

When do Harvard law students perceive digital file sharing (and piracy) as fine?