Ethics as science explains why it is so important for people to have good characters, and to be wary of those who have predominantly bad characters.
Rosalind Hursthouse is a leading exponent of Virtue Ethics, also called Virtue Ethics Theory. (VT.) Read at Amazon books the blurb for her book entitled - On Virtue Theory… [size=80] “The study of public health aims to protect and promote the wel-lbeing of the public as well as reduce health inequalities. Public health ethics asks how far we should go to achieve these goals, balancing the rights and needs of individuals against those of the community. But what are these and how much weight should be given to each of them?[/size]” Then see the customerReviews for this well-argued little book 
It may be of interest to you (with thanks to ChatGPT which informs us) that Dr. Richard Taylor [although VT was not his primary concern in philosophy] did write an essay on Virtue Ethics. In it he gave some arguments for what advocates of VT, such as Dr. Hursthouse, and Dr. Nussbaum would set forth.
{In the References listed below you will note a stress upon the significance in Ethics-as-science of moral character.
[Dr. Katz explains therein the importance of cultivating morally-good traits.} Ethical Science completely agrees with this.
Taylor, in his brief summary, tells us that VT emphasizes the wisdom of developing good qualities within individuals, as opposed to focusing primarily on rules or consequences of actions. He argued that being a good person involves the cultivation of traits such as honesty, compassion, courage, and justice.
According to Taylor, as well as do Dr. Rosalind Hursthouse, Dr. Nussbaum, and many other prominent philosophers, ethics emphasizes the moral character of individuals and encourages them to strive for excellence in their actions and choices. Dr. Taylor in his writing highlighted the notion that these qualities are not mere external behaviors but rather internal dispositions. And it is these habits that shape one’s ethical conduct.
Taylor provides a framework for understanding ”morality” as an inherent aspect of an individual’s character, emphasizing the cultivation and practice of good traits to guide ethical decision-making and lead a morally-good life.
Do you agree? What are your views about VT ?