I will chime in here, with my professional (I'll spare a power level) view.
Seriously, and no meming, Mother fucking Adam Smith. He IS modern economics, anything is based off him, he is the corner stone of the field still. Many of the things he wrote about are outdated unrelated but the core is still there, were we get the splits of the schools come from him, it's all based on his understanding of the market it self.
While I love love LOVE people like Sowell, and have a signed Hans Herman Hoppe on my work desk, Smith founded my field period and you need to have a serious education, to understand how to still grasp something from him. Not to say, you can't read him green or unversed. But imho you read Smith because "he's the guy who started it" then go on to other people and kinda ignore him and think well who cares about 1700s grain price and how does that matter? Then you start thinking back and re read Smith educated and damn.. he was THAT good.
Also Paul Krugman is a faggot and literally wrong on everything always, I hope suffering upon him everlasting.