It is extremely clear that the author (born 1940) was part of the 'free love' generation. This frequently annoys me in authorship by folks of this generation because contrary to bonobo's, we don't actually resolve conflict using sexual activity.

The language is (imo) dated in other ways, it applies the concepts of 'black magic' vs 'white magic' to science but it's used to make some interesting points about a possible future solarpunk world and how 'pure science' is empty without dreaming and a morality that goes beyond our own generation. Though it did feel dated, I did like the concept(s) presented in the books. I won't be more specific due to spoilers.