Enter the Victorian period (1837-1901) which popularized the suit as daily wear for gentlemen.
Moving away from the long coat was born from practical purposes so that men could wear a suit that was fit for riding a horse wearing an outfit that wouldn’t get in the way. Thus the less formal cut was developed for sports and country wear. At the same time, the dinner jacket was created for casual events creating the new dress lounge code.
Continuing through Edwardian time, less formal suiting became a staple.
Post-war era, the simplification of the suit came out of necessity with standardization, streamlining the amount of cloth used moving away from the double-breasted style.
From iconic musicians like the Beatles donning mod suits to the various styles of blazers we now see in various styles of lapels, to the boardroom with business attire, the suit has become the staple in every man’s wardrobe.