What is a favorable condition for democracy?

Democracies remain successful provided the government does nothing more than protect each individual's right to life, liberty, and private property. As soon as a government promotes the violation of the rights of some in favor of others, conflict arises. Soon the government is reduced to a tool of enrichment for whichever faction takes control irrespective of its purpose. Essentially, there are 3 options: no one violates anyone's rights, the few violate the rights of the many, and everyone violates the rights of everyone else. Only in the first case is democracy sustainable.