This book develops a philosophy of the predominant yet obtrusive aspects of digital culture, arguing that what seems like insignificant distractions of digital technology - such as video games, mindless browsing, cute animal imagery, political memes, and trolling - are actually keyed into fundamental aspects of evolution. These elements are commonly framed as distractions in an economy of attention and this book approaches them with the prospect of understanding their attraction, from the starting point of diversions. Diversions designate not simply shifting states of attention but characterize the direction of any system on a different course, a theoretical perspective which makes it possible to investigate distractions as not only by-products of contemporary media and human attention. The perspective shifts from distractions as the unwanted and inconsequential to considering instead the function of diversions in the process of evolutionary development. Grounded in media theory but drawing from diverse interdisciplinary perspectives in biology, philosophy, and systems theory, this book provocatively theorizes the process of diversions - of the playful, stupid, cute, and funny -  as significant for the evolution of a range of organisms.