Spiritually speaking, who gets to decide what is moral?

God has already decided. That is why we have the Bible and God gave us the ten commandments as well as Jesus summing it up with Matthew 22:36-40

36 Master, which is the great commandment in the law?

37 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind.

38 This is the first and great commandment.

39 And the second is like unto it, Thou shalt love thy neighbour as thyself.

40 On these two commandments hang all the law and the prophets.

If you follow that you needn't worry.

In your discussion, you confuse three arguments:

1/ who decides what is moral?

2/ what is moral?

3/ is morality fixed or can it change with time and events?

The answer to:

1/ It is a form of social consensus

2/ morality is the rules that ensure that a society is stable and that its members are bonded to it.

3/ it changes... your illustration of slavery is a very good example

NB:

R&S is not the best place for a discussion on morality as religion is about social control not social cohesion. You may find a better class of argument in philosophy as that is the workplace of ethics.

My father has thought me my morals and how to be a gentlemen growing up, Now I feel confident and respectful, You don't have to be religious or atheist to have good morals. My father and mother have decided what was moral, and thought me, and now I'm going to pass it to my children.

UPDATE: No, Because me and my parents think that is immoral.

God, the bible, even the clergy, don't have much say on what's "moral". That's usually left up to those that win wars. The winner decides for the loser.

How about that!! Evil decides morality!!!

Gotta love those moralists. And their AK-47s. OR ELSE!!

As to the "atheists solution"to this.. If you mean secular humanist, you should read the concept of "veil of ignorance"

That's what seculars go by, and personally, I think it's a decent system.

Conscience.

We are self-aware beings, and we know we are capable of manipulating our environment via our choices. We know what's right and what's wrong at the most fundamental level. Like, hurting someone with no reason, is bad. You know what it is to hurt, because yourself can get hurt too. Laws of physics never lie.

The Lord decides.

God decides what is moral. He gives us a conscious to show us when we fall short. Some people have seared their consciouses to the point where they no longer function.

companies.