@entity01 you said marriage can be successful when there is communication, trust, respect and compromise to have a common ground.

You also said that couples can improve communication when there is active listening and openness about their feelings.

You added that trust in a marriage involves having confidence in your partner's reliability, integrity, and also commitment to the relationship.

you again said that the only way for couples to navigate conflicts healthily is by open communication. There should be honest communication and each partner should feel comfortable expressing their thoughts and feelings without any fear of judgment.

You equally said that distance between spouses and cultural differences can certainly present challenges in a marriage

I agree with all your submissions and I want to add that LOVE is the principal thing here. Where is no love, putting all these things together will amount to nothing.
I wish you good luck.