Why is the legislative branch important in protecting human liberty?

Why, if one is concerned with protecting human liberty, would one want to make the legislative branch of government dominant (rather than the executive or judicial)? Are there good reasons why someone concerned with liberty would distrust a strong executive? A powerful judiciary? Is liberty most often threatened by (a) powerful political elites who escape public control or (b) a majority intent on imposing its will on a minority? Which of these cases would lead one to favor a strong legislative branch?|||The legislative branch is usually the one who create legislation that violates the rights of citizens.