The most open country in the world - Netherlands
The Netherlands is an open and tolerant country, where many things are legally allowed. Girls are allowed to get married at the age of 12, because in the Netherlands at the age of 12 is declared adulthood, with the right to fall in love, there is no problem of early love, plus sex education is relatively sound, we are not surprised by this.
There are also red-light districts, which are known to be illegal in China, but are not regulated in the Netherlands, where they are legally established. The women who work in them are able to defend their legal rights from being violated, and everyone respects these sex workers.
Drugs are something we should all be afraid to talk about, but the Netherlands has given drugs a green channel, setting up special smoking areas in many places, and also allowing the sale of related paraphernalia. It is worth noting that the Dutch government has set requirements for the quantity to be sold: no more than 5 grams per purchase and a tax on drugs.
When it comes to "pornography, gambling and drugs", the laws of most countries around the world explicitly prohibit it, because the threat and hidden danger it poses to society is self-evident. The existence of red light districts is allowed, and drug use has become a legal thing, so I have to admit: the Netherlands is the most liberal country in the world.