Defunct The Henry Jackson Society (HJS) is a trans-Atlantic foreign policy and national security think tank, based in the United Kingdom.

American political journalist, Michael Allen, described the society as "a non-partisan group that convenes transatlantic center-left, center-right and independent figures committed to Jackson's legacy of 'democratic geopolitics.

'"[15] The Society was founded on 11 March 2005 by academics and students at Cambridge, including Brendan Simms, Alan Mendoza, Gideon Mailer, James Rogers and Matthew Jamison.

[25] In 2014, when far right news outlet Breitbart expanded into the UK, its managing editor was Henry Jackson Society member Raheem Kassam.

[36] The Society has produced a breadth of research reports and papers, with a recent focus on the impact of COVID-19 on civil liberties, critiques of far-right extremism in western democracies and the possible legal response to China's COVID-19 culpability.

[37] Other areas of research include Islamic extremism and Islamist terrorism, crackdowns on human rights and democracy, and various facets of foreign policy and defence.

Marko Attila Hoare, a former senior member, cited related reasons for leaving the think tank and Scottish Labour leader Jim Murphy was urged, in 2015, to sever his links with the Society.

[58][60] According to a report by the Cordoba Foundation in 2015, "right-wing politics is apparent not only in the ideas that the Henry Jackson Society promotes, but also emerges distinctly on examination of its funders".

[62] Co-founder Matthew Jamison, who now works for YouGov, wrote in 2017 that he was ashamed of his involvement, having never imagined the Henry Jackson Society "would become a far-right, deeply anti-Muslim racist ... propaganda outfit to smear other cultures, religions and ethnic groups".

Their spokesperson has said: Our work with groups like the Henry Jackson Society is critical to helping the industry understand and make progress on these important issues.

It is through collaborations like these and with governments, academics, and others companies, through the Global Internet Forum to Counter Terrorism, that we improve our collective ability to prevent terrorists and violent extremists from exploiting digital platforms.

[65]Dr Nafeez Ahmed, executive director of the Institute for Policy Research & Development, criticised the group for hawkishly advocating for regime changes and war-mongering in the Middle East and "hyping up US homeland terror".

[69] The Henry Jackson Society is a registered charity in England and Wales and receives financial backing from private donations and grant-making organisations which support its work.

The Parliamentary Commissioner for Standards, Kathryn Hudson, upheld a complaint against these APPGs, but noted that the Society had already resigned, and its non-provision of secretariat services therefore "appears to have taken effect" as the rules intended.