He is clearly on the opinion that specialization means the best entity (person, company, country, he talks about all three) capable of creating each product wil

He is clearly on the opinion that specialization means the best entity (person, company, country, he talks about all three) capable of creating each product will tend to work on it, and then trade. The theory of comparative advantages is a very unintuitive idea. There's a reason that it took until the 20th century for economists to notice it.