It is not uncommon for people to question whether or not they need a will. If you are single, or even married, with no children and limited assets, the answer is likely no. Your assets may pass via intestate succession (see intestate link below).
If you have children, you should get a will for the primary purpose of establishing who will become the guardian of your children at your death.
If you do not have any living heirs, you definitely want a will.
If you have specific items of property that you want to go to specific people, you need a will.
If you and your spouse have an estate that is valued at over a million dollars (this amount would include life insurance policies you own), you will want a will that gives your heirs the flexibility to utilize your estate tax exclusion.
If you and your spouse have an estate that is valued at over two million dollars (this amount would include life insurance policies you own), you should expend the funds necessary to acquire the assistance of an estate tax planner.
Everyone over the age of 18 should have a durable power of attorney for medical care and a durable power of attorney in the event of incapacitation.
Whether or not a person acquires a living will is a personal decision.
Idaho Intestate Succession