Lesley Roger's message is loud and clear - how we behave (as a community, as a male or female, as heterosexual or homosexual - even as asexual.......) is dependent on so many factors - environmental, cultural, hormonal .... Any attempt to reduce behaviour to one of these factors is misguided.
Consequently the book debunks or challenges much that has been investigated in a search to show the influence (and for some, determination) of biological factors such as hormones. Perhaps my biggest disappointment in the book is that so much of it attacks research results rather than use research results that support the message. And disappointment I did have in the book, even though I agree with much that I read (such as the criticism of Matt Ridley's 'The Red Queen').
But hormones do affect behaviour - of that there can be no doubt. Consequently men and women - as groups - will be different. What hormones don't do is dominate behaviour.