My personal idea: There isn't "one" intelligence, or maybe there isn't even any intelligence at all. There is abstraction, there is creativity, there is adaptability, there is lateral thinking, there is empathy, there is communication, there is method and there is memory. What most people call "intelligence" is actually a mix of these things, and what other experts call "different intelligences" are actually different balances of this mix. For example, a good mathematician has a high level of abstraction, a good skills in lateral thinking, fair memory, is methodical, and usually little to no empathy, communication and creativity :P Abstraction is a key "intelligence" for programmers too, lateral thinking is important for every task that consists in solving problems quickly (Sherlock Holmes would be your example of lateral thinking master) and so on... So, no, I have yet to find an IQ test that measures "intelligence". I've seen tests that focus on memory (even "mathematical" tests often just test your ability to remember a lot of theorems), or focus on abstraction, a few rare tests focus on lateral thinking... so, they are good to compare how good you are in one aspect compared to the rest of those who take that test, but not more than that.

Not as long as we have politicians. They shout so much that our species will always have to keep its vocal cords working :D