His weakened immune system couldn't cope with the infection.

For when he knew his Rival freed and gone, / He ſwells with Wrath; he makes outrageous Moan: / He frets, he fumes, he ſtares, he ſtamps the Ground; / The hollow Tow'r with Clamours rings around: […]

So all the knowledge about these times comes from literature and, while it is likely that the magnificence of their capital cities and palaces was exaggerated, it is clear that they were fairly remarkable. But just such a city was Hsien-yang, somewhere in the vicinity of modern Hsien-fu, which was big even by contemporary standards, its population reaching nearly a million, and Ch’i (an important state in Shantung) had a capital city measuring 1.5 by 3 kilometres (0.9 X 1.8 miles).

For that we need instead of a university, a pluriversity. A pluriversity has the responsibility of educating future generations to live not only in pluri-national states, as has been declared, for example, in the constitutions of Bolivia and Ecuador, but also in a pluri-spistemic and pluri-spiritual world.