AlmostthewholesystemofGreekideasuptothetimeofAristotleisrepresentedinhisencyclopaedicconstruction。
Mathematicalandastronomicalsciencewaslargelydevelopedatalaterstage，butinthefieldofsocialstudiesnohigher
pointwaseverattainedbytheGreeksthanisreachedinthewritingsofthisgreatthinkerBothhisgiftsandhissituation
eminentlyfavouredhiminthetreatmentofthesesubjects。Hecombinedinraremeasureacapacityforkeenobservationwith
generalisingpower，andsobrietyofjudgmentwithardourforthepublicgood。Allthatwasoriginalorsignificantinthe