You may or may not have heard the term "ethical will". But, for those who care about making their values and ethics part of their legacy, it is a tool to consider when planning your estate.
Unlike a "last will and testament", which provides for the distribution of a person's material assets, or a "living will", which contains instructions for how you want to be treated medically at the end of your days, an "ethical will" is designed to let someone preserve and share their values, principles and beliefs for heirs and future generations, though it's not legally binding.