-There are other licenses, most notably including the <a>BSD license</a>, which is similar to the MIT license, and the <a>AGPLv3</a>, which provides slightly more restrictions on reusers so that hosting a web application effectively counts as distribution. Code available under the GPLv3 can be used in an AGPLv3 application, but code only available under the AGPL cannot be used in a GPL application. Again, we recommend the GPL for compatiibility.
+There are other licenses, most notably including the <a>BSD license</a>, which is similar to the MIT license, and the <a>AGPLv3</a>, which provides slightly more restrictions on reusers so that hosting a web application effectively counts as distribution. Code available under the GPLv3 can be used in an AGPLv3 application, but code only available under the AGPL cannot be used in a GPL application. Again, we recommend the GPL for compatibility.
+
+For a permissive license, MIT and BSD are basically equivalent ([MIT TLO](http://tlo.mit.edu/community/software) recommends BSD online, but in person indicates that they don't differentiate). We recommend MIT over BSD just because much of Athena already uses it, [MIT appears substantially more popular](https://github.com/blog/1964-license-usage-on-github-com), and [Github recommends it](https://choosealicense.com/).