Schwarz and others were staunchly opposed to apartheid and called for a much more rigorous opposition to the National Party.
There was much division in the United party, between liberals and conservatives in the 1960s and early 1970s.
Divisions came to a head in 1972 when Harry Schwarz, leader of the liberal "Young Turks" within the party, wrestled the leadership of the party in the Transvaal from Marais Steyn.
In 1975 Harry Schwarz broke away from the party with four other MPs, two senators, ten members of the Transvaal Provincial Council, 14 out of the 36 Johannesburg City Councillors, four Randburg City Councillors formed the Reform Party.
The Reform Party stands for the removal of discrimination based on colour.