For what city, founded on the murder of brother by brother, could ever escape the murder of citizen by citizen? The poet Quintus Horatius Flaccus (‘Horace’) was just one writer of many who answered that question in the obvious way. Writing around 30 BCE, in the aftermath of the decade of fighting that followed Caesar’s death, he lamented: ‘Bitter fate pursues the Romans, and the crime of a brother’s murder, ever since the blood of blameless Remus was spilt onto the ground to be a curse on his descendants.’ Civil war, we might say, was in the Roman genes. To be sure, Romulus could be, and often
