It has been said (many,many times) that democracy cannot come from the outside. This is, if I may say so, blindingly obvious so let us skip that straw man and get to the heart of the issue.

It has been said that western style democracy or even basic human rights are not best for every culture. It has also been said that to believe as much is arrogance

Topic for debate:
Are human rights and/or "western style democracy" (please define this in your answer) best for all of humanity?

Human rights: si.
"western style democracy": in my opinion, western style democracy is the best form of government yet devised... unfortunately, we don't even have "western style democracy" in the west anymore.

It would be difficult to say "no" to "human rights." Perhaps it would be better to try to define what these rights should be. This is not at all easy, of course, and there are many disagreements even within nations with more-or-less representational governments. In general, one should emphasize the maximum amount of individual freedom and the minimal amount of individual harm. These two goals will often oppose each other, and some compromise and a healthy amount of struggle is necessary.

At the risk of cultural arrogance, it seems difficult to improve on representational government for all but the smallest of societies. (By this I mean very isolated pockets of human beings, in small enough numbers that consensus is possible.) The United States should provide information (not propaganda) on the advantages of representational government to nations which lack it. (The United States should also be willing to accept information from nations with representational governments on the advantages of policies pursued by those governments. Let us be a shining light on a hill, indeed; but let us make use of the light from other hills as well.)

If I was the leader of a country and if I had to adopt human rights and democracy, I think I would consider three keypoints :

1. Are democracy and human rights good for my people, meaning will it improve their lives and make them happier?

2. Are they good for me, meaning is it an advantage inasmuch as my political goals?

3. Are they good for my neighbors, meaning they consider me as more friendly?

If the answer is yes each time, then I would adopt these new values.

How could human rights not be good for your people?

It sounds quite obvious that they are better, doesn't it? My quote was designed to present all the considerations a leader would take to understand and apply human rights.

Some leaders may be reluctant because human rights may bring freedom too quickly to the people, therefore creating a risk for civil disturbances and chaos... That would be against the collective interest.

However, on the long term, human rights are definitely the best solution.