Statement:
Zambia has a lower Human Development Index than Sao Tome and Principe

In the Human Development Index rating Zambia holds position #154 ²⁰²¹ out of 187 and Sao Tome and Principe is #137 out of 187 ²⁰²¹.
Position of Zambia is worse than position of Sao Tome and Principe.

Referencies:

1. Human Development Index ²⁰²¹ by United Nations

   The countries in the rating sorted by 'Human Development Index' in descending order.

   Sao Tome and Principe	'Human Development Index' value is	0.62
   Zambia	'Human Development Index' value is	0.56