I don't know where to even begin. First, you need to read and understand the pros and cons of Samuel P. Huntington, who is Fukuyama's mentor. Fukuyama is his successor in his ideas of identity and cultures is what makes politics.

I have read previous Huntington/Fukuyama's writings. This book felt like Fukuyama was taking the best bits and writing a new thesis or updated theses from his last works. The first 100 pages are a good basic history of the philosophy of identity through the ages.

Fukuyama goes into present-day conflicts when it comes to identity politics: Black Lives Matter, Me Too movements. He brings those groups into the lenses of Huntington and himself about how the groups will continue to create conflict unless as a nation, country and a world be able to get over culture rifts and differences otherwise we will continue to decay to keep on his previous themes. The last part felt rushed and not entirely well thought out.