Ka kammala wannan magana: 'Yan tarihi sun ci gaba da yin muhawara a kan lokacin da Daular Roma ta kai lokacin da ta fi ƙarfi. A wani ƙarshen, an ambaci rashin tsaro na 1880s da 1890s, musamman haɓakar masana'antu na Amurka da Jamus. Yaƙin Boer na biyu a Afirka ta Kudu, 1899-1902 ya fusata wani abu mai tasiri na tunanin Liberal a Ingila, kuma ya hana mulkin mallaka goyon baya na ɗabi'a. Yawancin masana tarihi sun yarda cewa a shekara ta 1918, a ƙarshen Yaƙin Duniya na Ɗaya, raguwa na dindindin ba zai yiwu ba. Yawancin masarautun sun 'yantar da kansu kuma sun fara nasu manufofin kasashen waje da na soja. An zuba jari a duk duniya don biyan yakin, kuma tattalin arzikin Birtaniya ya kasance cikin damuwa bayan 1918. Wani sabon ruhun kishin kasa ya bayyana a yawancin yankuna, musamman a Indiya. Yawancin 'yan tarihi sun yarda cewa bayan Yaƙin Duniya na biyu, Biritaniya ta rasa matsayinta na ƙasa mafi iko a duniya, kuma ta kusan faɗuwa a batun kuɗi. Tare da
Suez fiasco na 1956, zurfin rauni ya bayyana ga kowa da kowa kuma saurin decolonization ba makawa.