Retrospective on quantization

Quantization is still a central problem of modern physics. One example of a n unsolved problem is the quantization of Nambu mechanics. After a brief co mment on the role of Harrison cohomology, this review concentrates on the c entral problem of quantization of QCD and, more generally, quark confinemen t seen as a problem of quantization. Several suggestions are made, some of them rather extravagant.