Abstract Sex investigates the impact of advances in contemporary science and information technology on conceptions of sex. Evolutionary theory and the technologies of viral information transfer, cloning and genetic engineering are changing the way we think about human sex, reproduction and the communication of genetic information. Sex is no longer a linear proces or a private act. It is now central to the proliferating world of cyber-capitalism. Humankind has entered a time of molecular sex, when information is traded not only across sexes but across species and between humans and machines. Abstract Sex presents a philosophical exploration of this new world of sexual, informatic and capitalistic multiplicity, and of the accelerated mutation of nature and culture. Luciana Parisi is Senior Lecturer in Digital Media Cultures in the Department of Cultural Studies, University of East London.