Here is a link to a BBC Radio 4 program of the impact of Bruce Lee and Kung Fu in the 70s.
He is seen as the catalyst in diffusing martial arts to the West.
The program is called 'In Living Memory - Kung Fu'.
Also, in here they interview an academic from Cardiff, who has an interesting blog, too:
I liked the way in the radio program they mention how the film 'Enter the Dragon' (1972), promotes Lee like a James Bond character. Also, noted is the representation of the Orient in this type of genre (thinking David Carradine's series Kung Fu), which uses stereotypes of Eastern philosophy which are just not realistic outside a California beach. This type of representation is a form of 'othering' that sets apart people as being distinct. (In the blog above there is a picture of Chinese characters in English pantomimes - have a look for that). The program ends saying that the martial art shown in the film is 'a fake' simulation not authentic martial arts. A film's symbolic construction.