Does everyone need a will?

If you do not have a will, then the state “creates” a will for you because of the laws of intestacy. So, in my opinion, everyone who has any assets that will be distributed through probate should have a will. See my discussions of Washington D.C. Intestate Succession Laws and Maryland Intestate Succession Laws, which address how assets are distributed in your jurisdiction if you don’t have a Will. It’s not the way you probably imagine it will be!