Standing page

Reuse Terms: Diagrams, Data and Images

Updated November 2, 2026

Treaties & Tradeoffs hopes its timelines, charts and data tables get used in classrooms, podcasts, wiki articles and other people's research. This page sets out what may be reused, on what terms, and how to give credit.

Diagrams and data tables: CC BY 4.0

The diagrams this site draws itself (timelines, schematic maps, comparison charts and similar figures) and the CSV data tables offered for download beside articles are released under the Creative Commons Attribution 4.0 International license: https://creativecommons.org/licenses/by/4.0/

You may copy, adapt and republish them, including commercially, as long as you give credit. Under each diagram, the caption carries a short notice:

Diagram: Treaties & Tradeoffs. CC BY 4.0.

When you reuse a diagram, a fuller credit line is available to copy on the article page. It takes this form:

Diagram: Treaties & Tradeoffs, "{figure title}" — {page URL}, CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

Replace {figure title} with the title of the diagram and {page URL} with the address of the article it comes from. If you change the diagram, say so, for example by adding “adapted” after the title.

For a CSV table, credit Treaties & Tradeoffs and give the address of the article page. The short file that sits beside each download names the table, its license and the data it draws on. Figures that come from other works keep their own source in each row, and those sources deserve credit too.

A link back to the article is welcome and is one reasonable way to credit it, but it is not a condition of the license.

Some diagrams are drawn over a third-party base, such as a scan of an old document or map. In those cases the CC BY license covers only the layer this site added. The base keeps its own status and has its own credit line, which should travel with any reuse.

The license covers diagrams and data tables only. It does not extend to article text, to illustrations, or to images from other sources.

Illustrations: not under CC BY

Some articles carry a cut-paper illustration that sets a scene. These illustrations are not released under Creative Commons, and they are not public domain. Each one is credited with this notice:

They are scene-setting pictures, not records of real people, objects or events, and should not be reused as historical images.

Images from other sources

Paintings, prints, photographs and document scans from other sources each carry their own credit line under the image, naming the work, its creator, the page it came from and its license or public-domain basis. Reuse them on those terms, not on this site's. Among the kinds that appear here:

paintings, prints and photographs in the public domain, with the basis stated, such as the creator's year of death;
works that museums have released under CC0;
works of the United States federal government, in the public domain under 17 U.S.C. §105;
a photograph under the Creative Commons Attribution 2.0 license, which requires credit to the rights holder named in its caption.

Quoted text

Quotations from public-domain texts follow the original editions named in each article's source list. Some sources are only summarized here, not reproduced, because their terms do not allow republication; their wording is not part of anything this site releases.

Fonts

The site is set in IBM Plex Serif, IBM Plex Sans and IBM Plex Mono, © IBM Corp., with Reserved Font Name “Plex”, used under the SIL Open Font License 1.1: https://openfontlicense.org/

Citing an article

Each article ends with a Cite this page block giving the site name, the article title, the date of publication, the date of the last substantive revision and the page's permanent address. Add the date you accessed the page. Treaties & Tradeoffs does not issue DOIs, so a citation should not include one.

Questions about reuse can go to contact@treatiesandtradeoffs.com or through Back channel.