With the progress of science, technology, medicine, and general understanding of the the vast universe and cosmos in the last 2000 years, it is easy overlook the philosophies of the ancient Greeks or even designate them as outdated and useless. And, in any practical sense, to further expand our current understanding of science, technology, medicine I would agree; it's not like the leading scientific minds or doctors must have full knowledge of Greek philosophy to discover new technologies/medicines. But besides the practical reasons there is a "human" reason why those scientists and doctors should have some knowledge of Greek philosophy. What is the point of technology if people can't benefit from it? What are medicines/treatments if people can't or refuse to take it? It is important to understand the "human" side of things since these advancements are for people and the best way is to learn and understand the different perspectives of different types of people, morality, beliefs. Greek Philosophy is a perspective, a set of beliefs, a set of beliefs on morality. The Greek Philosophers: from Thales to Aristotle gives a brief, and yes super brief, overview of the history and views of certain philosophers including Heraclitus, Parmenides, Socrates, Plato, Aristotle and a few others.
Guthrie starts with explaining that some words and what they meant to the ancient Greeks were different than how we perceive them today. For example the word "god" to the Greeks did not mean a white male with a beard and robe living in the clouds (IDK I'm not Christian don't flame me), it meant more of a primal force that has existed and will exists and non changing. He also explains that it is important to take the philosophy in context with that time. So obviously if some rando comes up to you claims that everything on earth and earth itself is made of water and the our planet is surrounded by rings of fire and smoke with holes and the water inside of it gets turned to steam and spews out and that's why we see stars, moon, and the sun, we would try to get him help for drug abuse or maybe some mental breakdown idk not a doctor. This claim of how the earth is made of water and such is a claim by a philosopher that is discussed in this book. but according to Guthrie we have to consider that the ancient Greeks didn't possess the knowledge we have so we can't disregard it as some crazy mumbo jumbo and instead entertain it as legitimate wisdom. But yes, the book goes over various claims on the true nature of life, the earth, the stars, motions, humanism, soul albeit very brief and sometimes it feels like "biting into a pie and find that there is no filling (from Netflix's Witcher)".
And yes I joke but I do agree with Guthrie and believe that things people did or said in the past should be taken with historical context that does not mean completely erasing the faults of terrible people in the past but maybe try to understand the context. So for example, yes, some of the founding fathers had slaves but I mean all the rich white people with land back then had slaves back then that doesn't absolves the racist and terrible practice of slavery but to say that the founding fathers were terrible and should be remember as horrible people disregarding the fact that they laid the foundation of this country is absurd but I digress.
In this book, there will be dicey topics for today audience in 2023 not necessarily back then (this book was published in the 60s). For example, this book goes over Aristotle's philosophy on the form and matter of human (basically the nature of human being and their soul/consciousness), and oh boy if this guy was living today and saying this stuff he would get canceled immediately, he wouldn't be able to get a job, open a bank account, or rent an apartment he would be cancelled into the abyss. Basically, Aristotle believes that the human soul and the body are inseparable, they are not the same thing but "it is as if the body were the instrument through which a particular life or soul expresses itself". Yes if that sounds contradictory to current gender beliefs of today that's because it is. Today, it is discovered that gender dysphoria, a belief that a sense of unease that a person may have because of a mismatch between their biological sex and their gender identity, is prevalent and real. But again it is important to just look at Aristotle's philosophy based in the historical context of back then.
The real strengths of the Greek that I admire is that there were many philosophers and thinkers back then all discussing with one another and having different views but they all spoke to one another, if the recorded documents and evidence is to be believed, and all entertained the views that differ from themselves. Today diversity of thought is scant, you get cancelled for saying the wrong thing and intellectual discussion/debate is frowned upon and placed below affirmations and confirmations of people's feelings. I believe this book and books like this would be a good step to understanding the Greek way of thinking from back then and maybe if more people read things like this then intellectual discussion and discourse would be encouraged more instead of echo chambers.
This book provide a good first step into the philosophy of the ancient Greeks but it is very brief and superficial. I suspect this book would be supplementary material to a beginning philosophy course in college but I have no idea. I do recommend though that philosophy in general be study a bit more and even people in stem should be open to the idea of learning more philosophy.