In Civ VI, there are a number of civilizations that are best suited for defensive and isolationist playstyles. Here are five of the best:

  1. The Aztecs: The Aztecs are a great civilization for defensive play because of their unique ability to build walls. They can also build an impressive amount of units that can defend themselves, making them difficult to attack.
  2. The Mayans: The Mayans are great for isolationist play because they have the ability to build large numbers of units that cannot be attacked from the front. This makes them very difficult to take down, even if you have a larger army.
  3. The Vikings: The Vikings are great for defensive play because they have a lot of units that can block enemy units from reaching your cities or your resources. They also have a lot of cavalry units, which can help you break through enemy lines if necessary.
  4. The Russians: The Russians are great for defensive play because they have a lot of infantry units that can hold their own against other armies. They also have some powerful artillery pieces, which can help you take down enemy buildings quickly and easily. ..