U Thant (/ˌuː ˈθɑːnt/;Burmese: ဦးသန္႔; MLCTS: u:san.; Burmese pronunciation: [ʔú θa̰ɴ]; January 22, 1909 – November 25, 1974) was a Burmese diplomat and the third Secretary-General of the United Nations, from 1961 to 1971. He was chosen for the post when his predecessor, Dag Hammarskjöld, died in September 1961.

"U" is an honorific in Burmese, roughly equal to "Mr". "Thant" was his only name. In Burmese he was known as Pantanaw U Thant, in reference to his home town of Pantanaw.

Thant was born in Pantanaw, Lower Burma, and was educated at the National High School in Pantanaw and at University College, Rangoon, where he studied history. He was the eldest of four sons and was born into a family of well-to-do landowners and rice merchants. His father, Po Hnit, had helped establish The Sun (Thuriya) newspaper in Rangoon and had been educated in Calcutta, British India. He was also a founding member of the Burma Research Society. U Thant's father, according to Thant Myint-U (U Thant's grandson), had both Buddhist and Muslim forebears. His father died when Thant was fourteen, and a series of inheritance disputes forced Thant's mother, Nan Thaung, and her four children into difficult financial times. His brothers U Khant, U Thaung, and Tin Maung, were also politicians and scholars.

Dag Hjalmar Agne Carl Hammarskjöld ( [dɑːg ˈhamːarɧœld] (help·info)) (29 July 1905 – 18 September 1961) was a Swedish diplomat, economist, and author. The second Secretary-General of the United Nations, he served from April 1953 until his death in a plane crash in September 1961. He is one of four people to have been awarded a posthumous Nobel Peace Prize. Hammarskjöld remains the only U.N. Secretary-General to die in office, and his death occurred en route to cease-fire negotiations. American President John F. Kennedy called Hammarskjöld “the greatest statesman of our century".

Dag Hammarskjöld was born in Jönköping, Sweden, but spent most of his childhood in Uppsala. The fourth and youngest son of Hjalmar Hammarskjöld, Prime Minister of Sweden from 1914 to 1917, and Agnes Hammarskjöld (née Almquist), Hammarskjöld's ancestors served the Monarchy of Sweden since the 17th century. He studied first at Katedralskolan and then at Uppsala University where he graduated with a Bachelor of Laws and a Master's degree in Political economy. During this time he served for a year as the first Curator at Uplands Nation later moving to Stockholm.

Blessed Mother Teresa of Calcutta (Albanian: Nënë Tereza) as she is known to the Catholic Church, or Mother Teresa as she is commonly known, was born Agnes Gonxha Bojaxhiu (pronounced [aɡˈnɛs ˈɡɔndʒa bɔjaˈdʒiu]). Although born on the 26 August 1910, she considered 27 August, the day she was baptized, to be her "true birthday". “By blood, I am Albanian. By citizenship, an Indian. By faith, I am a Catholic nun. As to my calling, I belong to the world. As to my heart, I belong entirely to the Heart of Jesus.” Mother Teresa died on 5 September 1997 and is not yet a Catholic Saint. In late 2003, the leaders of the church completed the process of beatification, the third step toward possible sainthood. A second miracle credited to Mother Teresa is required before she can be recognized as a saint by the Catholic church.

Mother Teresa founded the Missionaries of Charity, a Roman Catholic religious congregation, which in 2012 consisted of over 4,500 sisters and is active in 133 countries. Members of the order must adhere to the vows of chastity, poverty and obedience, and the fourth vow, to give "Wholehearted and Free service to the poorest of the poor". The Missionaries of Charity at the time of her death had 610 missions in 123 countries including hospices and homes for people with HIV/AIDS, leprosy and tuberculosis, soup kitchens, children's and family counselling programmes, orphanages and schools.

Walter A. Dorn (born July 11, 1961) is a scientist, educator, author and researcher. He is Chair of the Canadian Pugwash Group, the Canadian branch of the Pugwash Conferences on Science and World Affairs which received the 1995 Nobel Peace Prize.

Dorn teaches military officers and civilian students in Toronto at the Canadian Forces College (CFC) and also in Kingston at the Royal Military College of Canada (RMC). He lectures and leads seminars on peace operations, ethics of armed force, the United Nations, arms control, Canadian and US foreign/defence policy, Canadian government and society, and science/technology applications. He also serves as Chair of the Department of Security and International Affairs at the CFC.

He completed his doctorate in Chemistry at the University of Toronto and now applies this scientific background toward the study of peace and conflict issues. He has pursued this work at the Pearson Peacekeeping Centre in Nova Scotia, where he developed and taught courses, as well as at Cornell University, where he was a Senior Research Fellow.