What IS good, and how do we determine it?

[Nope]

The Hebrews weren't behaving any better than other warriors in other cultures. Rome had the legend of Rape of the Women of Sabine. According to the legend around the 8th century BC, the Romans invited another tribe to celebrate in their city. The Romans, who needed wives, forcibly took the women to marry. Legend says that the women eventually accepted their lot and tried to end the war between their tribesmen and the men married them via rape. It is only a legend but it shows that the Hebrews weren't practicing a kinder, more gentle rape. Bible god's higher moral standard was surprisingly similar to the morals of just about everyone else during that period when it came to rape and marriage.