Abstract
The significant theoretical objections that have been raised against memetics have not received adequate defense, even though there is ongoing empirical research in this field. In this paper I identify the key objections to memetics as a viable explanatory tool in studies of cultural evolution. I attempt to defuse these objections by arguing that they fail to show the absence of replication, high-fidelity copying, or lineages in the cultural domain. I further respond to meme critics by arguing that, despite competing explanations of cultural evolution, memetics has unique explanatory power. This is largely founded upon the increasing likelihood of formulating a workable fitness measure for memes, a memetic index. I conclude that memes must be integrated with psychological bias and population-dynamic approaches to cultural evolution.