You are an ambassador for Earth to an alien species (Let's assume that both Earth and the alien's planet remain fractured into many independent nations on their home planet, but have an international space program), explaining various facets of your culture. Although the alien ambassador listens intently, several questions simply confound him. Why does your planet place taboos on things such as nudity or swearing? Why does a significant portion of the planet hate or fear their race? What does your species hope to accomplish with interplanetary or interstellar travel should they obtain it?
How would you, as a diplomat for humanity, explain these questions to an organism which had very little knowledge of human culture or history?
How would you, as a diplomat for humanity, explain these questions to an organism which had very little knowledge of human culture or history?