Coach Carter wrote:R9 at Inter was the best footballer I've ever witnessed and I've been watching since 94. Serie A was his playground and this was at a time when it was considered by many as the best league in the world. As people have already mentioned, the likes of Maldini, Nesta and Thuram couldn't defend him. I remember the 98 world cup, a lot of star players and good cohesive teams, which is something you don't get nowadays with an increase in player movement. Out of all the stars, he was the dude every fan wanted to see.
I'm a huge NBA fan but, just for cultural heritage (I'm assuming you're from the US, am I wrong?), most likely you've seen x10 as many games than me -at least- since you were a little kid, and grew up surrounded by lots of other BB fans, watching games with them and talking about it for countless hours. Plus, you've probably played ball at least your whole childhood.
Point is: I do have some knowledge and understanding of BB, played quite a bit. But I'll never have your "eye" for it.
This is football for me, so trust me on these two things:
1. Ronaldo Nazario best season (it was a single one) was playing for Barça, and is not even remotely close.
2. That peak has a serious case as the best striker ever... only if you don't consider Messi a striker. Ronaldo played as a 9, Messi as a 10. In fact, arguably Guardiola rescued from the 70s and re-defined the now so in vogue "fake 9" position for Messi.
But semantics aside, and even leaving out of the conversation all the other abilities that Messi has and O Fenómeno hadn't, Messi is (even) a much better dribbler and (even) a much more effective and versatile scorer.