in reply to The world is not object oriented
As I am on the other side of the divide of mathematicians, I should feel more comfortable with objects, and to some degree, this seems true, as my first "real" language was Turbo Pascal 4, and I implemented my own object oriented windowing system on top of it (or rather, I learned, that it is bad to have parameter lists of 30ish mandatory parameters, and passed records around). I'm not sure though, whether this was because object orientation was the destined path or whether object orientation has been the most successful tool for windowing systems.
On the other hand, I have been passing around functions as parameters since TP4 as well, but Perl was my first language where I could pass around real closures - TP suffered from being tied to the processor stack, like C.
On the third hand, "Object Orientation" means (to the functional programmers) only that you have a lot of functions that take a common first parameter or that have a curried first parameter, so all hardcore Lisp programmers will consider Object Orientation just syntactic candy, but I, as a Perl programmer, like syntactic candy.
perl -MHTTP::Daemon -MHTTP::Response -MLWP::Simple -e ' ; # The
$d = new HTTP::Daemon and fork and getprint $d->url and exit;#spider
($c = $d->accept())->get_request(); $c->send_response( new #in the
HTTP::Response(200,$_,$_,qq(Just another Perl hacker\n))); ' # web