positive-sum

positive-sum (not comparable)

1. (game theory) Pertaining to a game or situation where overall benefits to all participants can increase. [from 20th c.]
   • 2011, Steven Pinker, The Better Angels of Our Nature, Penguin, published 2012, page 220:

     Morality […] is a consequence of the interchangeability of perspectives and the opportunity the world provides for positive-sum games.

• negative-sum
• zero-sum