It is not uncommon for someone to pass intestate (which means with no will). Click on the links below for additional information about how the laws of intestate succession work in a few states:
Some types of property such as bank accounts and life insurance policy proceeds may be distributed to beneficiaries without a will according to who is named on the accounts. However, do be aware of these dangers of using payable-on-death or transfer-on-death beneficiary designations:
Wills Do Not Cover Disability Planning
Wills only cover disposition of your estate at death. For management of assets during lifetime, such as during a period of incapacity, you need quite a bit more, including Powers of Attorney and often one or more trusts.