What would the modern world be like without the CIA?
This is a very broad question. If we're speaking about CIA are we assuming there would be no replacement organization performing the CIA's functions? Before CIA, there was OSS...If CIA had not been established, perhaps another US government agency or the military would have performed the mission outlined in CIA's charter. Without intelligence, the US would not be the world power it is today, so clearly the world would be very different. It is a difficult question to answer...you need to ask something more specific if you want a concert answer.