The United States is the only country in the world that legally allows declawing, but declawing is a painful and difficult operation. It is the same as removing the first joint on all your fingers. It impairs the cat's balance and causes weakness from muscular disuse. Declawed cats are defenseless. Cats need their claws for protection. You may know that your indoor cat will never have to climb a tree in order to escape their neighbor's chihuahua, but your cat doesn't know it. Declawing makes a cat feel insecure and defenseless. It is radical to cut off so many parts of the body to prevent such a simple behavior problem.
The stress resulting from being declawed creates more problems than it allegedly solves. Some declawed cats become more nervous biters; others are known to become even more destructive to furniture than before the operation; and many cats stop using the litterbox.
There are alternatives to declawing. Exercise and play with your cat regularly. Give him a scratching post and teach him to use it. Temporarily confine your cat to a small area where he does not have access to your furniture. A few days in a room with a litter box, food, water and of course a scratching post is much more humane than declawing. Trim you cat's nails on a regular basis. The curved tip of the claw is the part that hooks into fabric, rugs, etc., and causes the most damage.