Aristotle and Rand ethics would fall into the eudaemonism category, where human happiness is considered the good.
Spinoza's ethics is said to be rational, but it was never published in his lifetime because his writings were condemned and suppressed by the Christian church.
The beauty in a rational ethics is that irrationalities that appear would be so-identified for rational correction.
That's a whole lot better than having religious nuts bombing everything in sight.
I get the impression I'm talking to a program that simply repeats Randian cliches.