Originating in London around 300 years ago, porter evolved from earlier sweet, Brown Beer popular at the time. Evolved many times with various technological and ingredient developments and consumer preferences driving these changes. Became a highly-popular, widely-exported style in the 1800s before declining around WWI and disappearing in the 1950s. It was re-introduced in the mid-1970s with the start of the craft beer era. The name is said to have been derived from its popularity with the London working class performing various load-carrying tasks of the day. Parent of various regional interpretations over time, and a predecessor to all stouts (which were originally called “stout porters”). There is no historic connection or relationship between Mild and Porter.