Smalltalk tries to solve the problem of mutable state in a unique way. Where some languages say "mutable state is bad, minimize or isolate state changes," Small

Smalltalk tries to solve the problem of mutable state in a unique way. Where some languages say "mutable state is bad, minimize or isolate state changes," Smalltalk gives you amazing tools for monitoring the state of objects in the system. The level of control at every level of execution is unlike any other language. You can open up live inspectors on any object, edit a method in the debugger and restart the stack frame you are looking at, and persist all of it across programming sessions in the image.