This model is based on recent work in evolutionary biology suggesting that under certain environmental conditions altruism can be more beneficial to an individual's reproductive success than selfishness.

For detailed instructions on using the program, take a look at the info window from the Altruism model.

Download the StarLogoT source code for the Altruism model:
Download altruism

To run this file you need StarLogoT2002 for the Macintosh.
(download StarLogoT)

Click on one of the pictures to see a quicktime movie of the model: