1.1 The introductory part of this note [1] pays due homage to Epstein and Axtell's (1996) seminal book on the social simulation model known as Sugarscape. Two comments follow: first, on so-called methodological individualism and second, on the possibility of defining a robust framework for the development of agent based simulation models, such as Sugarscape. Replies to these comments would be more than welcome. It is useful to develop a discussion on these themes, now that the foundations are being laid for a wider use of" bottom-up" or agent based simulation techniques.