[Machine Translation] Kill one person and five people will be saved. Should you kill that one person? JUSTICE" is a very popular philosophy lecture at Harvard University that continues to challenge the ultimate difficult question for which there is no right answer. From economic crises to catastrophes, philosophical questions about "justice" are always lurking at the root of the hardships that cover the modern world. This is the long-awaited collection of the bestseller that caused a social phenomenon together with NHK's "Harvard's White Heat Classroom".