Hanson was born in London, the second son of Benjamin Hanson, a fruit merchant and importer, and was educated at a private school in Melbourn,
Cambridgeshire. Admitted a solicitor in 1828, he practised briefly in London, becoming a disciple of
Edward Gibbon Wakefield in connection with his colonization schemes. Hanson joined
The Globe as a political critic early in 1837. In 1838 he went with
Lord Durham to
Canada as assistant commissioner of inquiry into crown lands and immigration. Hanson worked with
Dominick Daly in Canada. In January 1840, on the death of Lord Durham, Hanson settled in
Wellington, New Zealand, as Land Purchase Officer for the
New Zealand Company. He was active in purchasing land in various parts of New Zealand. He also purchased the
Chatham Islands in 1840, which was not part of New Zealand at the time. He then became the first crown prosecutor in Wellington. He moved to the colony of South Australia in 1846 and immediately set up a legal practice. He served as Advocate-General and
Attorney-General for the colony before election to the seat of
City of Adelaide in 1857. In 1851 Hanson was appointed advocate-general of the colony, initially as a temporary replacement for the ailing
William Smillie, made permanent when Smillie died. He took an active share in the passing of many important measures, such as the first Education Act, the District Councils Act of 1852, and the Act of 1856 which granted constitutional government to the colony. In 1856 he was attorney-general in the first ministry under
Boyle Travers Finniss; becoming premier himself in 1857. After leaving parliament, Hanson replaced
Sir Charles Cooper as Chief Justice of the
Supreme Court of South Australia in 1861. He was knighted in 1869 by
Queen Victoria when he visited England, and was acting
Governor of South Australia for 1872–73. In his spare time Hanson gave much time to theological studies. His publications include
Law in Nature and Other Papers (1865),
The Jesus of History (1869),
Letters to and from Rome (1869),
The Apostle Paul, and the
Preaching of Christianity in the Primitive Church (1875). He was elected the first Chancellor of the
University of Adelaide; the first vice-chancellor was
Augustus Short. He died in Australia on 4 March 1876. ==Personal life==