I recently blogged about Florida's position that divorces in this state are "no fault". Read the following snippet from a divorce case in Michigan from 1868 to see the contrast.
Courts cannot lawfully divorce parties merely because, from unruly tempers and mutual wrangling, they cannot live happily together. They are bound to submit to the ordinary consequences of human infirmity and unwise selection, and the misconduct which will authorize a divorce must be very serious, and such as amounts to extreme cruelty, entirely subverting the family relations by rendering the association intolerable. Cooper v. Cooper, 17 Mich. 205 , 97 AM. Dec. 182.
As stated before, current Florida family law does not require either party to show extreme cruelty as grounds for granting a divorce.