A University of Pennsylvania professor who was sanctioned by a court for acting in “bad faith” is set to teach a course on “misinformation” next year.
Michael Mann, a prominent climate activist and director of Penn’s Center for Science, Sustainability, and the Media, announced that he will again co-teach a course on climate change communication alongside Kathleen Hall Jamieson, a member of the National Academy of Sciences (NAS). The course, previously offered at the University of Pennsylvania, focuses in part on combating what Mann describes as a “surplus of misinformation” surrounding climate change.
“The problem isn’t so much a deficit of information; it’s a surplus of misinformation,” Mann said at a journalism conference, arguing that outright climate denial is fading and being replaced by what he calls “doomism, division, deflection, and delaying action.”
Mann recently confirmed the course’s return on a university podcast, describing it as a “real pleasure” to collaborate across Penn’s School of Arts and Sciences and the Annenberg School for Communication.
But Mann’s role as an authority on misinformation should draw scrutiny given his own legal history. A District of Columbia judge previously sanctioned Mann and his legal team, finding “by clear and convincing evidence” that they had acted in bad faith by presenting erroneous evidence and making false representations related to damages claims.
“Here, the Court finds… that Dr. Mann… acted in bad faith when they presented erroneous evidence and made false representations to the jury and the Court,” the ruling stated. The court ordered Mann to pay more than $28,000 in legal fees. The controversy adds to a broader pattern of inflammatory rhetoric and political activism from Mann, who has repeatedly targeted conservatives in public statements and on social media.
Mann has compared prominent figures such as Peter Thiel, Charles Koch, and Rupert Murdoch to the perpetrators of the September 11 attacks, and previously wrote that the Republican Party should be “destroyed.” He deleted the posts, but they were saved in screenshots.
Michael Mann has been trafficking in violence-justifying (wink wink) Tweets for a long time
He is celebrated and rewarded for it in the climate community
His latest won’t change that pic.twitter.com/YMpnmxAdWX
— The Honest Broker (@RogerPielkeJr) September 12, 2025
As reported by the Washington Free Beacon, Mann faced backlash for amplifying a social media post referring to conservative activist Charlie Kirk as “Hitler Youth,” a controversy that preceded his resignation as vice provost at Penn. He remains on faculty and continues to lead his research center.
The resignation came after Sen. Dave McCormick (R-PA) called on the university to take “immediate, decisive action.”
Mann has also drawn criticism for comments interpreted as invoking political violence, including a post referencing “second amendment territory” in relation to President Donald Trump, he has since deleted the post, but it was digitally archived to verify.
The course’s co-instructor, Jamieson, is a member of the National Academy of Sciences, which has itself faced scrutiny over its handling of climate-related materials. Critics have pointed to the academy’s refusal to remove a controversial climate chapter from its judicial reference manual, even after the Federal Judicial Center declined to include it, citing concerns about bias.
Mann has also recently praised the late biologist Paul Ehrlich, whose 1968 book “The Population Bomb” famously predicted mass starvation and societal collapse due to overpopulation — predictions that failed to materialize. Despite that track record, Mann continues to position himself as a leading voice on climate communication and misinformation.
The announcement of the course raises broader questions about credibility, academic standards, and whether individuals with documented histories of misleading claims should be tasked with defining “misinformation” for the next generation of students.
