When you are 97 you don't require a reason for dying, but John D the first died of arteriosclerosis on May 23, 1937.
John D. Rockefeller died because he lived a long time and got to be very old.
John D. Rockefeller died of arteriosclerosis on May 23, 1937, two months before his 98th birthday
5 feet 7 inches
John D. Rockefeller died on May 23, 1937 at the age of 97.