The notion of limited government under a constitution was very strongly developed - and argued over, and fought for - in England in the 17th century, and the concept has spread from there to the rest of the modern world. Yet a "constitution" and the notion of a constitutionally-limited government had, and still has, a more limited meaning in England than in the rest of the world.
The concept that became established in England is that although there are constitutional limits on the powers of the executive government, there are none on the power of the Parliament. Though the people trust that the Parliament will be nice to them (because it represents them, doesn't it?), in point of law it is sovereign, it "has the right to make or unmake any law whatever". Consitutionalism began its development in England, but after the triumph of Parliament in the Civil War, its development was, by other peoples' standards, frozen.
The other concept also originated in England, among the radically democratic elements during the Civil War, though it was first put into practice in the United States and we tend, therefore, to think of it as an American idea. That idea is that both the powers of the executive government and the legislature can be limited by rules of law, written in a special "rule book" called a constitution, and that these rules can only be changed in some special way, involving the consent of the people directly or indirectly. Though this is still a shockingly radical idea in England, it is now taken for granted in most other democracies. It is now the dominant idea in Australia (see Chapter 12), though traces of the idea of parliamentary sovereignty live on (see Chapter 14). Therefore we need to understand both ideas.
But the internal battles in England/Britain between King and Parliament - whether real civil war with blood everywhere, as in 1642-49, or just political standoffs resolved by the backdown of one party, as in 1834 - still have a point. They are part of the history of our political institutions (and since some English ideas were copied, and some of them even theorised about, in most of the democratic countries of the world, part of the history of international political concepts). So the next three chapters are about the bits of English/British history that left a permanent trace - the bits in which the institutions of modern government were developed.