NATO's 20th century strategy was building walls. That led to a lot of death. Instead, we need to build bridges with what Stavridis, the NATO supreme commander, calls open source security.
He identifies threats to the global commons: piracy in the seas, cyber crimes (which are a $2trillion per year industry), drug, weapon, and human trafficking. While there is a need for strong military, we won't deliver security solely from military means. We need international "public private partnerships for strategic communication on the internet."