As the global challenge of climate change mounts and the coronavirus pandemic magnifies economic inequalities, Karl Marx, who pointed to the contradictions and limitations of capitalism, is gaining new admirers in Japan, particularly among the young.

The boom was ignited by a 34-year-old associate professor at Osaka City University who re-imagined the theory expounded in the 19th-century German thinker's seminal "Das Kapital" from the perspective of environmental conservation in a bestselling book published last September.

In it, Kohei Saito argued that the realization of sustainable development goals set by the United Nations is as impossible as "drawing a round triangle" under modern-day capitalism.