McGowan argues that between 1890 and 1920, the city's Catholics experienced major social, ideological, and economic changes that allowed them to integrate into Toronto society and shake off their second-class status. The Irish Catholics (in contrast to the French) strongly supported Canada's role in the First World War. They broke out of the ghetto and lived in all of Toronto's neighbourhoods. Starting as unskilled labourers, they used high levels of education to move up and were well represented among the lower middle class. Most dramatically, they intermarried with Protestants at an unprecedented rate.