That's just in the US though. There's a whole world out there that is not the United States. The British Medical Association certainly claims to be a trade uni

That's just in the US though. There's a whole world out there that is not the United States. The British Medical Association certainly claims to be a trade union. https://www.bma.org.uk/about-us/bma-as-a-trade-union https://www.bma.org.uk/about-us/bma-as-a-trade-union And they have engaged in collective action - e.g. the junior doctors strike. https://www.theguardian.com/society/2016/sep/01/what-you-need-to-know-about-the-junior-doctors-strike https://www.theguardian.com/society/2016/sep/01/what-you-nee...