https://www.amazon.com/gp/product/B00EGWEYTG/This book is very good. It convincingly shows that early humans, hunter-gatherers, were monogamous. Polygamy came with agriculture. The book shows that polygamy causes endless wars. We know that war encourages polygamy by causing a shortage of men, but it is equally true that polygamy causes war so that single men can capture women from other societies. This is a convincing argument against Islam, which follows the pattern of having endless wars.