Unfortunately people who apply it to the wrong purpose are not worth anything. Hitler was and Putin is intelligent too.
Biswa ji...I think you have forgotten that Intelligence can be divided into:
1)Sattva Intelligence which is a recessive gene and both parents need to be the carriers for it.
2)Rajas Intelligence which is a dominant gene where its dominates over Sattva and Tamas genes.
3)Tamas Intelligence which again a recessive gene and both parents need to be carriers for it.
Now coming to Sattva intelligence.
Sattva minds seldom discover anything new..creative capability is less but they are hard working and do not misuse their intelligence and are good at memorizing.
The Sattva Intelligence is more pre-occupied with preserving knowledge more that utilizing its practical applications so these individuals appear "calm".
The Rajas Intelligence can be extremely creative or extremely destructive.
The creative Rajas intelligence is seen in inventors ,scientist etc.
Destructive Rajas intelligence is seen in politicians,dictator and criminals.
The Rajas Intelligence is pre-occupied in "creating" something "new".Its always in unrest and Type A personality trait is seen in these types.
Tamas Intelligence is the ignorance is bliss mind..there are not hard-working and have untapped latent talents but over all they are happy and seldom trouble others.