Heinlein wrote it, his character Lazarus Long presents it. May or may not mean Heinlein thought it was true. It's oft-quoted but I think it's silly posturing. I

Heinlein wrote it, his character Lazarus Long presents it. May or may not mean Heinlein thought it was true. It's oft-quoted but I think it's silly posturing. I guess everyone's just insects after all, since 99.99% of people will never do or even be prepared to do anywhere close to the whole list.