At around the beginning of the industrial revolution people wanted a government that represented them. Why? Because being freed from the tedious and hard work of farming gave them time to rest and to think. They thought, and they wanted a more democratic government - they didn't want to be ruled by a King. The printing press helped share these ideas of freedom and democracy. Also being pissed off at your living conditions and the government in general helps.
A society is only three meals away from anarchy. -Ian Maclaren
In the Peterloo Massacre between 60,000–80,000 people were killed in England for demanding the reform of parliamentary representation. They wanted the right to vote. This and other movements for reform eventually lead to the Reform Act 1832 and it launched the rise of modern democracy in Britain. [citation]