They depend on the outside world for survival, just as plants and humans do.
- They need a steady supply of capital, also known as the money supply.
- They need buyers for whatever it is they make, and
- Suppliers for whatever materials they make it from.
- They need a government that lets them do their job without taxing them to death or pestering them to death with regulations.
- they make money or
- lose money,
- thrive or
- wither away.