By the 1960s, Cameron realised Labor would never win a federal election again unless it could find both a leader and a set of policies acceptable to an increasingly middle-class electorate. Ward's death in 1963 marked the end of the old Depression-era leftism in the federal Caucus. The younger leftist leaders such as Cameron, Jim Cairns and Tom Uren were sober enough to adapt to the changed circumstances. Cameron became increasingly critical of Arthur Calwell's leadership but supported Calwell in his passionately opposing the Vietnam War.