Having a growth mindset (the belief that you are in control of your own ability, and can learn and improve) is the key to success. Yes, hard work, effort, and persistence are all important, but not as important as having that underlying belief that you are in control of your own destiny
The British Labour Party grew out of the trade union movement of the late 19th century and surpassed the Liberal Party as the main opposition to the Conservatives in the early 1920s
