I agree with the second sentence but I don't see how history shows the third is true. Foreign interests have undermined both democratic and non-democratic state

I agree with the second sentence but I don't see how history shows the third is true. Foreign interests have undermined both democratic and non-democratic states... any time a nation has taken control of its interests and resources (either democratically or not), powerful outsiders tend to put a stop to it. How does that promote democracy?