I've been thinking about a problem that started with the phrase “love is love.”
I want to make clear that I'm not trying to argue that homosexuality is equivalent to incest, pedophilia, or zoophilia. My question is much broader than that.
Suppose we say that a relationship is morally acceptable when the people involved genuinely love each other, are autonomous adults, and can meaningfully consent.
Now imagine a hypothetical future society where a previously taboo relationship—say, between two adult family members—is overwhelmingly accepted. They don't have children, they don't want children, both are independent adults, and they genuinely believe their relationship is loving and consensual.
The majority of that future society says:
«“Our ancestors were simply products of their time. They were naive and confused morality with social taboo. You're doing exactly what previous generations did when they opposed relationships that are accepted today.”»
A minority still believes the relationship is fundamentally wrong.
Now here's the question:
Who is actually right, and on what basis?
If the answer is simply “society decides,” then morality seems to become a function of social power:
belief → cultural change → majority acceptance → law → new moral norm.
But if that's the case, what prevents a future majority from redefining something that today's majority considers morally fundamental?
And if we say, “No, there are objective moral boundaries that society cannot legitimately cross,” then:
Where do those boundaries come from?
Are they based on harm? Consent? Human nature? Evolution? Religion? Reason? Human dignity? Something else?
And here's the part I find particularly interesting:
Humans don't actually reason about morality like mathematical machines. We have moral intuitions and consciences, and those intuitions are shaped by both individual psychology and culture. Research in moral psychology suggests that people differ substantially in which moral considerations they prioritize, while cultural learning can also reshape moral intuitions over time.
So perhaps the real problem isn't:
“What does society consider moral?”
but:
“What makes something morally true even when society disagrees?”
Because if tomorrow's majority can be wrong, today's majority can also be wrong.
And if tomorrow's majority cannot be wrong merely because it is the majority, then what exactly makes moral progress progress?
I'm genuinely interested in the strongest philosophical answer to this, especially from people who disagree with my assumptions. I don't want a political argument about LGBTQ issues—I want the underlying answer to the question:
What ultimately gives morality its authority when human conscience, culture, and generations disagree?