moral

Shalom Rabbi, in your article on morality and halacha you wrote – Thirdly, morality depends on the norms that develop in different times and places, and therefore the Torah does not want to set strict limits on it. There was once no moral problem with captive rape, but today there is one. The Torah does not set strict limits on morality, not only to make it easier, but also to make it stricter. In our time, when the matter is clearly perceived as a moral problem, there is no reason for the Torah to permit it. In other times, the situation is different. Therefore, the Torah is content with the general statement "And you shall do what is right and good," which commands us to act morally, without specifying further what is right and good that is required of us. Every person and every society is required to understand this for themselves from their conscience and the values ​​they were raised on.
And I ask – what do you mean by morality depending on evolving norms, and that there was once no moral problem with raping a captive, since morality is objective? Just like today, I assume, captives were once harmed by rape. Why then should morality change according to the norms of the time?