ɐ mˈæsɪv ænd ɪŋkɹˈiːsɪŋ nˈʌmbɚɹ ʌv bˈʊks ænd ˈɑːɹɾɪkəlz hɐvbɪn ɹˈɪʔn̩ ɔnðə tˈɑːpɪk sˈɪns nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi fˈaɪv; wˈɛðɚ pˈɑːpjʊlɚ ɔːɹ skˈɑːlɚli, dᵻskɹˈɪptɪv ɔːɹ ɪntˈɜːpɹɪɾətˌɪv.
A massive and increasing number of books and articles have been written on the topic since 1945; whether popular or scholarly, descriptive or interpretative.