Only by making a will or some other advance property transfer arrangement can a person set up his own laws of descent and make sure that his wishes for the distribution of his property will be carried out after his death.
O'Bryne, John C. and Timmons, John F.
"If You Have a Will,"
Iowa Farm Science: Vol. 15
, Article 3.
Available at: http://lib.dr.iastate.edu/farmscience/vol15/iss8/3