[7] Cappon was subsequently a prominent organizer for the eighth annual Congress of International Physicians for the Prevention of Nuclear War, held in Montreal in June 1988.
[12] Rae chose not to run; Cappon, along with many Quebec delegates, supported Steven Langdon on the first two ballots of the party's leadership convention before shifting to the eventual winner, Audrey McLaughlin.
"[16] Cappon initially planned to seek the NDP's nomination in Laurier—Sainte-Marie for an August 1990 by-election,[17] but he withdrew his candidacy in light of his quarrel with Edmonston.
[26] In December 2006, Cappon called for a national strategy and better quality control in relation to post-secondary education, warning that other countries were far exceeding Canada in developing targets for funding, graduation rates, class size, and other matters.
[27] Cappon and Assembly of First Nations leader Phil Fontaine announced a new framework for evaluating learning in Canada's indigenous communities in November 2007.
[28] The government of Stephen Harper removed funding from he Canadian Council on Learning in March 2010, on the basis of what some commentators believe were ideological motivations.
In September 2010, Cappon introduced a new study warning of a projected rise in the percentage of adults with low literacy skills in Canada's major cities.
[30] After the council ceased operations, Cappon became a senior fellow at the University of Ottawa's graduate school of international and public policy.