The best answer for the question According to the Declaration of Independence, when should the people have the right to change their government?

Race, for example, the chinese exclusion act

Water,oil,and

It may be written down (as in the united states) or it may be unwritten (as in great britain). this is the 1787 meeting at which the  constitution of the united states  was debated and agreed upon. this was a 1787 meeting called by congress to amend the articles of the confederation.