What have been the most significant developments in HR over the last 50 years?

What events - e.g. major pieces of legislation - or gradual cultural shifts - do you feel have been the most significant developments in HR & L&D over the last 50 years?

I'm thinking the 1970s, 1980s, 1990s, 2000s, and 2010s.

I'd love to get your thoughts?

Note: this is a slightly different question to the one I posed 7 years ago, but might delight if you've not read it before: I remember typing pools... 

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  • It was 'Labour Officers' etc in the 'Labour Department' when I first started - ie the necessary specialist front line / interface between the employer and (their almost 100% trade unionised) workpeople. There was a 'Personnel Manager' who ran the Labour Dept. but only from a comfortable and exalted location well behind the front line, out of range of all the grimy hands and boots and raised voices.