They represent:

If you were looking for information on the general concept of taboos or the popular board game, here is a quick breakdown:

The series is often packaged as a complete collection featuring all four installments: Part 1: The Ruthless Beginning

While the specific contents of the collection are unclear, it is likely that it features a range of films and shows that have been influential in shaping American attitudes towards taboo topics. The collection may include classic films like "The Last Picture Show" (1971), "The Graduate" (1967), and "Midnight Cowboy" (1969), which pushed the boundaries of on-screen sex and violence.