What happened to the simulations web site? Simulations that demonstrate concepts in the text were formerly available at evolutiongenetics.georgetown.edu. As of July, 2024 my institution no longer supports that web site and it has gone off-line permanently. (The web site was initially developed with the support of a grant from Georgetown's Initiative for Technology Enhanced Learning.)
An alternative is to use Jupyter notebook versions of the simulations written in Python. These produce the same results graphs, except without a user interface. Simulation parameter values can be set in the code. These Jupyter notebook files are also linked on the text resources web page.
All Jupyter notebooks were checked in November, 2024 and updated if needed.