https://en.wikipedia.org/wiki/Naturalism_(philosophy)
Stanislavski was a revolutionary person in theatre history, he thought at first that the acting was not good enough so he was able to come up with a method that could make the actor be able to do his or her best when acting.
Stanislavski's system is a progression of techniques used to train actors and actresses to create believable characterizations for their performances. The method that was originally created and used by Constantin Stanislavski from 1911 to 1916 was based on the concept of emotional memory for which an actor focuses internally on portraying a character's emotions onstage.
Parts of the system:
The "Magic If"
Stanislavski believed that the truth that occurred onstage was different from that of real life, but that a 'scenic truth' could be achieved onstage. A performance should be believable for an audience so that they may appear to the audience as truth. One of Stanislavski's methods for achieving the truthful pursuit of a character's emotion was his "Magic If." The actors would ask themselves how would they feel if they were in the character's position, therefore, they would be able to act very realistically.
Motivation
Through the use of the system, an actor must analyse their character's motivations. Stanislavski believed that an actor was influenced by either their mind or their emotion to stimulate their actions, and the actor's motivation was their subconscious will to perform those actions. Therefore, motivation has been described as looking to the past actions of the character to determine why they completed physical actions in a script.[1]
Objectives
The objective is a goal that a character wants to achieve. This is often worded in a question form as "What do I want?" An objective should be action-oriented, as opposed to an internal goal, to encourage character interaction onstage. The character doesn't necessarily have to achieve the objective, and the objective can be as simple as the script permits. For example, an objective for a particular character may simply be 'to pour a mug of tea.' For each scene, the actor must discover the character's objective. Every objective is different for each actor involved because they are based on the characters of the script.
https://en.wikipedia.org/wiki/Naturalism_(philosophy)
Melodrama
A melodrama is a dramatic or literary work in which the plot, which is typically sensational and designed to appeal strongly to the emotions, takes precedence over detailed characterization. Characters are often simply drawn, and may appear stereotyped. Because of the long timeframe in which the style has existed, and the variety of formats used, it is difficult to give a precise definition.
https://en.wikipedia.org/wiki/Melodrama