more astonishing than <what> any one person can

[sos-english]

Hello, everyone !!!

Traditional custom,taken the world over, is a mass of detailed behavior more astonishing than what any one person can ever evolve in individual actions,no matter how aberrant.


I wonder the function of what in this above sentence.
Thanks in advance : D

 

[Greyfriar]

Hello,

For 'what' read 'that which'.

This is a not a well-written sentence. Please let us know its source. Thank you.