In his book 'How We Think', Dr. Marius Ostrowski, a political and social theorist from Oxford, categorizes human thought into 10 distinct styles. These styles are Happy Camper, Jokester, Hothead, Keen Bean, Quibbler, Gloomster, Agoniser, Cool Cat, Worrywart, and Reveller. Each type reflects different emotional states and approaches to life. For instance, the Happy Camper is optimistic and warm, while the Gloomster tends to brood and expect doom. The Agoniser is characterized by activism and a desire for societal improvement, whereas the Worrywart is prone to overthinking and anxiety. Ostrowski emphasizes that individuals often embody a mix of these styles, shaped by their experiences and environments. He encourages readers to explore their own thinking styles through a quiz included in his book, highlighting the complexity of human thought and interaction.