17th World Congress: 2008; Washington, DC; July 6-8; "E Pluribus Unum: Reclaiming Humanist Values"

16th World Congress: 2005; Paris; July 5-7; "Separation of religion and state"

15th World Congress: 2002; Amsterdam; July 3-6; "All different -- all equal: human diversity, human rights, Humanism"

Regional Humanist Congress: 2000; Sydney; November 12-14; "Ethics and values for this new century"

Regional Humanist Congress: 2000; Buenos Aires; October 26-28; "Latin America: between freedom and fundamentalism"

14th World Congress: 1999; Mumbai; January 10-14; "Humanism for human development and happiness"

13th World Congress: 1996; Mexico City; November 14-19; "Global Humanism for the cyber-age"

European Humanist Congress: 1993: East Berlin; July 25-30; "Democracy, human rights and Humanism"

12th Congress: 1992; Amsterdam; July 26-30; "Humanism for head and heart"

11th World Congress: 1990; Brussels; August 5-11; "The secularization of society on the basis of liberty, equality and fraternity"

10th World Congress: 1988; Buffalo; July 31 - August 4; "Building a world community: Humanism in the twenty-first century"

9th World Congress: 1986; Oslo; August 2-7; "Humanists say yes to life"

Humanist Education conference: 1985; Brussels; August 28-30

International Humanist Peace conference: 1983; Zutphen; August 26-28; "Humanist answers to the problem of (nuclear) armament and peace education in a Humanist perspective"

8th World Congress: 1982; Hannover; August 1-5; "Anti-Humanist trends: challenge and response"

Humanist Education conference: 1980; Brussels; August 27-29; its purpose was to exchange experiences and reflect on methods and perspectives in the field

7th World Congress: 1978; London; July 31 - August 4; "Work for human needs in a just society"

6th World Congress: 1974; Amsterdam; August 5-9; "The Humanist revolution"

5th World Congress: 1970; Boston; August 4-9; "To seek a humane world (How can man direct his future evolution?)

European Regional Congress: 1968; Hannover; July 14-19; "Conservation and human fulfilment"

4th World Congress: 1966; Paris; July 25-30; "The Humanist response to the problems and aspirations of man"

3rd World Congress: 1962; Oslo; August 2-7; "In search of long-range goals for Humanism"

2nd World Congress: 1957; London; July 26-31; discussion focused on the concerns of IHEU in the fields of philosophy, personal life, social life and "organization and mission"

European conference: 1955; Antwerp; August 27-31; its objective was to work out the program decided at the inaugural congress of 1952 and to prepare the agenda for the second World Congress in 1957

Inaugural World Congress: 1952; Amsterdam; August 21-26; objectives as summarised by Jaap van Praag: "First to draft a conception of Humanism on an international level, and second to establish permanent relations between Humanist and ethical groups all over the world"

Sources: Gasenbeek, Bert and Gogineni, Babu, eds. 2002. International Humanist and Ethical Union 1952-2002: Past present and future. De Tijdstroom, Leusden; and IHEU.