← Resources & Sources
brand/foundational/sources/photos.md
Photos
Credits as published. The Wikimedia Commons photos (Deutsch, Popper, Bach, Levin) are freely licensed; the others are for internal reference only. Rittel and Webber have no free or high-resolution portraits online. The Rittel images are scans of photos printed in books; a sharper copy needs René Spitz, hfg ulm (2002), or the HfG-Archiv Ulm. For a larger Webber portrait, the lead is page 1 of Teitz & Christensen (2019), JPER, doi:10.1177/0739456X19885417 (paywalled).
| File | Who | Size | Source and credit | |
|---|---|---|---|---|
 | roesler-2025-manelski.jpg | Axel Roesler | 683×1024 | UW School of Art + Art History + Design faculty page; photo Doug Manelski (2025) |
 | roesler-2011-chronicle-brashear.jpg | Axel Roesler, with a Lego robot | 700×467 | The Chronicle of Higher Education (2011); photo Stephen Brashear for The Chronicle |
 | roesler-chid-portrait.jpg | Axel Roesler | 529×708 | UW Comparative History of Ideas faculty page; credit not stated |
 | rittel-1959-ulm-chalkboard.jpg | Horst Rittel, Ulm, 1959 | 638×479 | christian-faure.net; book scan with printed caption "Horst Rittel 1959"; credit not stated |
 | rittel-ulm-spitz-p287.jpg | Horst Rittel at the HfG Ulm | 631×423 | Medium; caption cites René Spitz, hfg ulm (2002), p. 287 |
 | rittel-1959-ulm-chalkboard-wide.jpg | Horst Rittel, Ulm (wider framing of the chalkboard photo) | 350×283 | designforschung.org; credit not stated |
 | webber-2006-berkeley-obituary.jpg | Melvin M. Webber, late in life | 220×304 | UC Berkeley News obituary (Dec 2006); photo Jane Webber |
 | bach-2013-ito.jpg | Joscha Bach, Cambridge, MA, 2013 | 800×800 (cropped) | Wikimedia Commons; photo Joi Ito, CC BY 2.0 |
 | levin-2024-templeton.jpg | Michael Levin, 2024 | 800×800 (cropped) | Wikimedia Commons; photo John Templeton Foundation, CC BY 3.0 |
 | deutsch-2015-benjamin.jpg | David Deutsch, 2015 (video still) | 380×380 (cropped) | Wikimedia Commons; Simon Benjamin, CC BY 3.0 |
 | popper-1980-barta.jpg | Karl Popper, c. 1980 | 600×600 (cropped) | Wikimedia Commons, from LSE Library on Flickr Commons; photo Franz Barta; no known copyright restrictions |
   | rittel-1959-portrait.jpg, webber-2006-portrait.jpg, roesler-chid-square.jpg | Square crops of the Rittel chalkboard, Webber and Roesler (CHID portrait) photos above, for the page portraits | 420, 220 and 529 px square | As the originals |
Mislabelled images found online, not of these people: the Webber half of a widely shared "Rittel and Webber" slide; Alchetron's "Webber" (actually the Rittel chalkboard photo); Alchetron's pipe-smoking "Rittel".