Diodorus is often described as an "uncritical compiler" because he relied heavily on the works of earlier historians, often reproducing them faithfully rather than providing original analysis. This makes his work invaluable to modern scholars, as it preserves accounts from lost historians such as: (Greek history 480–340 BCE) Hieronymus of Cardia (Successors of Alexander) Polybius and Posidonius (Roman history) How to Access the Work
: The remaining books (6–10 and 21–40) exist only in varying degrees of fragmentary form. Historical Significance and Sources Diodorus Siculus: Library of History
Diodorus Siculus, Library of History, Volume I: Books 1-2.34 Diodorus is often described as an "uncritical compiler"