Mark Fisher, also known under his blogging alias k-punk, was an English writer, music critic, political and cultural theorist, philosopher, and teacher based in the Department of Visual Cultures at Goldsmiths, University of London. He initially achieved acclaim for his blogging as k-punk in the early 2000s, and was known for his writing on radical politics, music, and popular culture.

Capitalist Realism: Is There No Alternative? is a 2009 book by British philosopher Mark Fisher. It explores Fisher's concept of "capitalist realism", which he describes as "the widespread sense that not only is capitalism the only viable political and economic system, but also that it is now impossible even to imagine a coherent alternative to it."