Any attempt to look into the future is fraught with difficulty and the likelhood that much of it will be wrong. If someone in 1898 had tried to foresee issues relating to the implementation of the laws and customs of war in the twentieth century, it is highly unlikely that he could have forseen many of the makor developements that these created.
"Implementation of International Humanitarian Law in Future Wars,"
Naval War College Review: Vol. 52:
1, Article 3.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol52/iss1/3