Its citizens pay moderately high tax rates and they are somewhat unhappy in their work environments as a result.
That's bad. Your taxes should be at 28%.
It believes nuclear weapons are necessary for the security of its people.
That's bad too. Your Government position on Nuclear weapons should only be:
We will never sign such a treaty. Doing so would endanger our people. Our nation promotes the use and build up of nuclear weapons.
, which is the one you have now, if you have nukes (or if you are about to buy nukes). You should change it to:
We will sign the treaty in order to appease the other nation. We are opposed to all nuclear research and weapons.
The second option is the best if you have Uranium and don't have nukes, so only if you start getting Uranium from a trade pick:
Our government will not sign the treaty because our nation believes in the use of nuclear technology to build power plants, however we do not promote the use of nuclear technology for weapons of mass destruction.
Also, get that last trade you are missing, and focus on buying infrastructure and improvements. You need to max out Stadiums and Banks as soon as possible, they are both among the best improvements, right after the Harbour and maybe the Factories.