At some point, we all ask the same question, "Mommy, where do babies come from?" Unfortunately, by the time we know the answer to this question most of never really asked or wrestled with the question, "Mommy, where do morals come from?"
Well, where do morals come from? Do they come from majority / cultural consensus, professional philosophers and ethicists, governmental agencies, or even "nature?" Are morals just the subjective "stuff" humans create - like ethical putty in each individual's hands?
Most rational people seek some standard for morals beyond self because they know murder is not okay contingent upon individual or cultural circumstances. The Nazis weren't right because they were in power or in the majority. Some folks retreat to an ethic that runs along the lines of, "Morality is anything that doesn't violate another person's rights, person, or property." Sounds good - and scores of undergraduates in secular colleges imbibe this thinking. However, this thinking is so thin it doesn't even withstand an iota of scrutiny.
What rights should people have and who decides on what basis? What does it mean to violate someone's person or property? How much property should someone have? Should there be communal limits to property ownership? And so on... The farther we press these kinds of questions the more we discover that this naive basis for morality always boomerangs back to self - which is the very recipe for anarchy or despotism.
Morals must come from God to have any basis or meaning - and not just the concept of God in general, but the Triune God. Morals must come from the Triune God because He originally and eternally has existed in a community of love - and He alone knows what it means to live in a unity of peace, fellowship, sacrifice, and joy. Humanity is a reflection of the unity-plurality of God and is made to live in bonds of love that reflect the Trinitarian fellowship of Father, Son, and Holy Spirit.
Morals aren't subjective putty or arbitrary ethical emanations from a vague God-source / force. Morals are the relational boundaries that reflect who God is in His Trinity - and who He has made us to be.
Unitarianism cannot offer this. Buddhism cannot offer this. Atheism cannot offer this - only Christianity can offer this. Only God as revealed in Jesus Christ reveals to us what it means to be "good" and live in harmony with each other as we mutually sacrifice on one another's behalf.
Where do morals come from? What is the fount of goodness that all men are called to emulate? The answer is not a philsophical proposition, but a divine Person, Jesus Christ.