*David A. Black in his book said on the topic of Object individuation*
:-

One of the cornerstones of Ruby°«s design is the ability of individual
objects to behave differently from other objects of the same class.
Every object is a full-fledged citizen of the runtime world of the
program and can live the life it needs to.

The freedom of objects to veer away from the conditions of ***their
birth has a kind of philosophical ring to it***. On the other hand, it
has some important technical implications. A remarkable number of Ruby
features and characteristics derive from or ***converge on the
individuality of objects.*** Much of Ruby is engineered to make object
individuation possible. ***Ultimately, the individuation is more
important than the engineering: Matz has said over and over again that
the principle of object individuality is what matters, and how Ruby
implements it is secondary.***

Can anyone help me to understand what did he mean by the *** lines only?

Thanks