"There was a time, 40 yrs ago or more, when the music had an edge. It was possessed by a renegade spirit. There was an element of danger in it. It was taking risks, crossing boundaries, making discoveries. The musicians themselves didn't have a name for this hybrid sound. They just played with the prevailing attitude of "let's do something different". It was Cream meets Coltrane. It was Jimi jamming with Miles, jazzers discovering the power of Rock, rockers capturing spirit of jazz. It was called Fusion." - Bill Milkowski, from the liner notes of a record called 'Chroma - Music On The Edge' (an amazing Fusion recording from the 90's featuring R Brecker, D Chambers, B Berg, M Egan, M Stern, and others). It's an oversimplification to define Fusion simply as the combining of Jazz & Rock. Let's look at the 4 greatest Fusion bands; Mahavishnu Orchestra, Weather Report, Return To Forever, & The Headhunters. The one thing they have in common is Jazz chops mixed with Rock volume/dynamics. Mahavishnu and RTF both brought a heavy dose of Classical structure and voicings. RTF also brought a Spain/Spanish/Brazilian influence (the 1st RTF band practically invented the electro/Brazilian/Jazz genre!). Zawinul and Weather Report had this European/other worldly international sound, and of course, Hancock's Headhunters brought the Funk! I've always felt that a prerequisite for a successful Fusion band is that there be at least a few virtuoso gun-slingers in the band! If I were to add the bio's of the musicians in these bands you'd see an amazing degree of variety in their overall experiences and skillsets. When you FUSE all the info and influences together you start to have a rudimentary understanding in the roots of true Fusion. In great Fusion you can hear Jazz, Rock, Classical, Funk, Latin, Brazilian, European, virtuosity, spirituality, and very importantly, a sense of fun! You guys remember having fun listening to music? The visceral joy you'd feel at a Hendrixian power chord? Rockin' out!? I'm 61 yrs old and I still enjoy rockin' out. It never ceases to amaze me when I meet with friends from my youth who USED to be avid music-lovers who have somehow lost it as they got older, or their musical tastes have softened to the point that they think 'rockin' out' is somehow immature or childish. Not this old timer! Anyhow, just thought I'd throw this Fusion tidbit out there, there's SO much more I could add. Lastly, any attempt to categorize Michael Brecker as just a 'Fusion' player couldn't be more incorrect. Anyone that thinks this is simply revealing how little they truly know. My concern is that perhaps someone that ISN"T familiar with the subject matter will read some things on this thread and believe them to be fact when they couldn't be more wrong!