Aragorn's political skills.

[Eruanna]

Does it take more then a "right" to the throne to actually take the throne? What I mean is, in politics, a key is the support of the people. And how do you get that support, through your battle experience.

Not just through experience in battle. Although traditionally a king is meant to be a warrior he is also expected to show great wisdom and a sense of justice.

I think that the fact that Aragorn fulfilled a prophecy is one of the reasons that he was accepted by the people of Gondor, they were longing for their king's return, after the troubles of recent times they looked to him as their saviour:

" Upon the formost ship a great standard broke...There flowered a White Tree, and that was for Gondor; but Seven Stars were about it, and a high crown above it, the signs of Elendil that no lord had borne for years beyond count..."

We must also not forget the fact that kings are traditionally meant to have the power of healing. In medieval times, being touched by the king himself or even his garment was believed to be the cure for a variety of diseases.

"The hands of the king are the hands of a healer. And so the rightful king could ever be known"

So says Ioreth, and after seeing Aragorn perform his healing ability on both Faramir and Eowyn, she is convinced and begins to spread the word.

"And soon the word had gone out from the House that the king was indeed come among them, and after war he brought healing; and the news ran throughout the city."

The people didn't just have to take Ioreth's word for it either. They had living proof in the form of their beloved Faramir.