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

In the Human Development Index rating Sao Tome and Principe holds position #137 ²⁰²¹ out of 187 and South Africa is #111 out of 187 ²⁰²¹.
Position of Sao Tome and Principe is worse than position of South Africa.

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
   South Africa	'Human Development Index' value is	0.71