Augustus-the single most important figure in Roman history; put an end to the advancing decay of the Republic and provided a new basis for government; he negotiated the dangerous seas of the last part of the Roman Revolution with skill and foresight
Tiberius-his reign is an important one for the Principate (formed by Augustus); his reign abounded in contradictions; he oversaw no new conquest
Gaius (Caligula)-he has the most poorly documented reign of the Julio-Claudian dynasty; Gaius was a crazed megalomaniac given to harebrained schemes; he had his co-heir killed within the first few months of Tiberius' death so that he could take the throne
Claudius I-In an age that despised weakness, Claudius was at a disadvantage; he limped, drooled, stuttered, and was constantly ill; Claudius' reign was a mixture of successes and failures