Michio Kaku explains in the video why he thinks that we will witness a transition from a Type-0 to a Type-1 civilization in the next 100 years:
The transition from Type-0 to Type-1 Civilization ... Will We Make It? - YouTube
I seriously doubt the assumption that we will reach a Type-1 civilization in about 100 years, for the reasons he state in the last part of his small lecture (i.e. terrorism, nuclear weapons, etc.).
What do you think?