I am from The Netherlands and this is one of the few articles on steemitis for people who want to know more about Holland and The Netherlands. I found the next phrase in our text quit intriguing:
"Historically Holland was the area that contributed the most to the Dutch kingdom's economy and wealth, thus becoming a common name to indicate the entire country, although incorrectly."
Part of the historical wealth of Holland was obtained by ripping off the former Dutch colonies. Also the coal mines in Limburg and (later) the gas found in Groningen/Drente have contibuted to the wealth of Holland.