Thats a Heinlein book I don’t want to read.
Morality is important.
Otherwise you get liberals.
Many of Heinlein's books explore alternative ways of evaluating "morality," leaving it to the reader to respond, "No way that'll work, but thanks for playing," if he chooses.
I did not like Stranger in a Strange Land, but it contained one, imo, brilliant idea: the "fair witness," a person trained and licensed to report accurately what he observed. For example, the character was asked, "What color is that building?" and replied, "The side I can see is white." Imagine how much confusion and argument would be avoided if people stated only what they actually observed, rather than what they assumed.
Better not read much of the old testament then