a window to / into / on / onto the world

/ɐ wˈɪndəʊ tʊ ˌɪntʊ ˌɒn ˌɒntʊ ðə wˈɜːld/

/ɐ wˈɪndoʊ tʊ ˌɪntʊ ˌɑːn ˌɑːntʊ ðə wˈɜːld/

something, such as a book, move clip, etc., that provides one with information about a variety of people, places, events, or things that one cannot physically interact with or experience

What is the origin of the idiom "a window to the world" and when to use it?

The idiom "a window to the world" likely originated from the literal meaning of a window as an opening in a wall that allows you to see outside. It has been used metaphorically to describe various means of gaining insight, knowledge, or a broader perspective on the world. This expression is used to refer to something that provides you with a view, insight, or understanding of the world at large. It can describe a physical window with a scenic view, but it is often used in a broader sense to talk about sources of information, experiences, or opportunities that broaden one's horizons.