This chapter of the book cuts pretty close to the bone.
For the past thousands of years, the work of humanity has evolved from that of a generalist to that of a specialist. Our ancestors have to forage, hunt, build their shelters and cook their own food to survive in the wilderness. These days, you can't even call yourself a marketing executive, you might have to specialise in a niche like social media marketing for an employer to take you seriously.
The lesson from this book is to stop reminiscing about being a successful generalist. One formula for success in modern society is repeatedly finding yourself a smaller niche and smaller niche until you can credibly be that big fish in the small pond. I think this lesson is supported widely in local salary surveys. Professional degrees have a higher pay and employment rate than general degrees.
Reading this chapter ......