Section 1983 gives people the right to sue a government official for violating their constitutional rights. Qualified immunity provides these same officials with an affirmative defense -- even if they violated the constitution, they are not liable for monetary damages if the right at issue was not clearly established at the time of the alleged conduct. The qualified immunity is based upon the basic assumption that “a reasonably competent public official should know the law governing his conduct.” If the law was clearly established the official will be liable. If not, the Court has reasoned that it would be unfair to hold defendants liable because they could not be “expected to anticipate subsequent legal developments.” At least one legal sc...