Based on A globally available filesystem is a security liability.

An incomplete list of globals:

• Filesystem
• Network
• Environment variables
• Current date and time
• Random seed
• Process spawner
• Native functions (FFI) caller
• Current geolocation
• …

A programming language with no globals would not be able to access the filesystem or network, and that is a good thing. The filesystem and network could be injected into the main function:

fn main(universe) {
  // universe.filesystem
  // universe.network
  // universe.time_now
  // …
}