Sir Marcus 'Mark' Laurence Elwin Oliphant, AC, KBE, FRS (8 October 190114 July 2000) was an Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

n physicist

Physicist

A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...

 and humanitarian

Humanitarianism

In its most general form, humanitarianism is an ethic of kindness, benevolence and sympathy extended universally and impartially to all human beings. Humanitarianism has been an evolving concept historically but universality is a common element in its evolution...

 who played a fundamental role in the first experimental demonstration of nuclear fusion

Nuclear fusion

Nuclear fusion is the process by which two or more atomic nuclei join together, or "fuse", to form a single heavier nucleus. This is usually accompanied by the release or absorption of large quantities of energy...

 and also the development of the atomic bomb

Nuclear weapon

A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter. The first fission bomb test released the same amount...

.

During his retirement, Oliphant was appointed as the Governor of South Australia by Queen Elizabeth II on the advice of Premier Don Dunstan

Don Dunstan

Donald Allan "Don" Dunstan, AC, QC was a South Australian politician. He entered politics as the Member for Norwood in 1953, became state Labor leader in 1967, and was Premier of South Australia between June 1967 and April 1968, and again between June 1970 and February 1979.The son of a business...

. He assisted in the founding of the Australian Democrats

Australian Democrats

The Australian Democrats is an Australian political party espousing a socially liberal ideology. It was formed in 1977, by a merger of the Australia Party and the New LM, after principals of those minor parties secured the commitment of former Liberal minister Don Chipp, as a high profile leader...

 party, and he was the chairman of the meeting in Melbourne in 1977 at which the political party

Political party

A political party is a political organization that typically seeks to influence government policy, usually by nominating their own candidates and trying to seat them in political office. Parties participate in electoral campaigns, educational outreach or protest actions...

 was launched.
Oliphant was born the eldest of five sons in Kent Town

Kent Town, South Australia

Kent Town is an inner urban suburb of Adelaide, South Australia. It is located in the City of Norwood Payneham & St Peters.-History:The suburb was named after Dr Benjamin Archer Kent, who established a farm and flour mill on which the suburb now stands.....

, a suburb of Adelaide

Adelaide

Adelaide is the capital city of South Australia and the fifth-largest city in Australia. Adelaide has an estimated population of more than 1.2 million...

, South Australia

South Australia

South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...

.