How can be described and evaluated the Geneva Convention rules of war?I want to know how well they are implied and if they really work?

The Geneva Conventions set the standards for humanitarian
treatment of people in time of war. They consist of treaties and protocols (or
amendments). The most recent one was ratified in 1949, after World War
II.

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Protected persons are entitled, in all
circumstances, to respect for their persons, their honour, their family rights, their
religious convictions and practices, and their manners and customs. They shall at all
times be humanely treated, and shall be protected especially against all acts of
violence or threats thereof and against insults and public curiosity. Women shall be
especially protected against any attack on their honour, in particular against rape,
enforced prostitution, or any form of indecent assault. Without prejudice to the
provisions relating to their state of health, age and sex, all protected persons shall
be treated with the same consideration by the Party to the conflict in whose power they
are, without any adverse distinction based, in particular, on race, religion or
political opinion. However, the Parties to the conflict may take such measures of
control and security in regard to protected persons as may be necessary as a result of
the war.

This
treaty was signed by 194 countries.

The Geneva Conventions
apply to countries who have agreed its terms. However, there are issues with regard to
your second question as to whether the conventinos work or not. When the Geneva
Conventions apply, countries must give up part of their national sovereignty to comply
with international law. These laws may not be in accordance with their own country's
consitution, values or other laws. Many critics argue that the Conventions offer many
rights to individuals but not to governments and governments are therefore hesitant to
accept the Convention's responsibilities.

Also, there are
all sorts of ways "around" the provisions of the Conventions. For example, currently the
United States is involved in "armed conflicts" in the Middle East. But, are they really
wars? What is the definition of "war"? In the U.S. Constitution, war has to be declared
by the Congress, and all of the U.S. conflicts have not offcially been wars. Plus, what
about countries that are not part of the Geneva Conventions? Just because the U.S. may
respect its provisions, does not mean that other countries will. Also, has the United
States complied with the provisions of the Geneva Convention at Abu Ghraib? It's
debatable. Were the terrorists imprisoned there "victims of war" or "enemy combatants"?
If they were "enemy combatants" then the U.S. has a right to protect itself, but if they
were "victims of war" then the Geneva Conventions were supposed to
apply.