Pope Francis
Fratelli Tutti §153
Fratelli Tutti: On Fraternity and Social Friendship
153 There are powerful countries and large businesses that profit from this isolation and prefer to negotiate with each country separately. On the other hand, small or poor countries can sign agreements with their regional neighbours that will allow them to negotiate as a bloc and thus avoid being cut off, isolated and dependent on the great powers. Today, no state can ensure the common good of its population if it remains isolated.
Source: Fratelli Tutti (Vatican.va)