One Big Union (Canada)
National Industrial Union of the Dominion of Canada | |
| Federation merger | Canadian Labour Congress |
|---|---|
| Founded | March 13, 1919 |
| Dissolved | 1956 |
| Headquarters | Winnipeg |
| Location | |
| Members | 70,000 (1919) |
Key people | Robert B. Russell Roger Ernest Bray |
| Affiliations | Socialist Party of Canada |
The One Big Union (OBU) was a left-wing industrial union based primarily in Western Canada. It was launched formally in Calgary on June 4, 1919, as a replacement for the then-outlawed Industrial Workers of the World, to carry on the drive toward revolutionary industrial unionism. Initially the OBU experienced a spectacular upsurge, then lost most of its members within a few years. It finally merged with the Canadian Labour Congress in 1956.