It could be argued that Natural Law isn’t the best approach to ethical decision making as well as it is. Natural Law is the philosophical view of St Thomas Aquinas on the kind rules humans should follow in their everyday life.
The ways in which Natural Law be suggested as ethical, or that it is seen as being absolutist, providing a firm moral foundation, including rules for guidance on issues not covered by the Bible, such as, IVF and genetic engineering. Secondary precepts are suitable for various cultures as they are more flexible, and society can be rational about them. For example, now education is more or less equal for boys and girls around the globe