Regarding games, what is the most important strategic decision (what is the most important component of a strategy)? Who determines a game? On what grounds? The legacy of Von Neumann and Morgenstern may be enriched by applying a contribution of Nash into the account of players’ choice of agenda as their primary decision, their choice, before playing, of what games not to play (war games, for example) and what games to play. This choice is a game that precedes the games that traditional game theory studies.