The claim that the English Civil War "split the population in two" is a standard and widely accepted characterization of the conflict. Multiple reputable historical sources confirm the fundamental division: - **English Heritage** states the wars "divided the country at all levels of society." - The **National Army Museum** notes the war "divided friends, families, and local communities" and that "There was no such thing as a 'typical' Royalist or Parliamentarian." - Regional patterns were clear: Parliament controlled most of the east and south-east, Royalist support centred on the west, north, and Wales, with disputed areas in between. Historians do note important qualifications: many people tried to remain neutral, allegiances were complex and driven by personal loyalty as much as ideology, and some switched sides. Wikipedia's article on the First English Civil War states that "a simple division of the opposing parties into Royalist Cavaliers and Parliamentarian Roundheads is a perspective now accepted as outdated." However, this nuance does not contradict the core assertion that the war fundamentally divided the population into two opposing camps. The existence of neutrals and complex individual motivations does not negate the reality of a society split between Royalist and Parliamentarian sides, which is how the conflict is universally understood. The phrase "split the population in two" is a reasonable, commonly used summary of the conflict's social impact. Sources: - English Heritage, "The English Civil Wars: History and Stories" — https://www.english-heritage.org.uk/learn/histories/the-english-civil-wars-history-and-stories/ - National Army Museum, "British Civil Wars" — https://www.nam.ac.uk/explore/british-civil-wars - Wikipedia, "First English Civil War" — https://en.wikipedia.org/wiki/First_English_Civil_War