Women and children first

"Women and children first" (or to a lesser extent, the Birkenhead Drill) is a code of conduct dating from 1852, whereby the lives of women and children were to be saved first in a life-threatening situation, typically abandoning ship, when survival resources such as lifeboats were limited. However, it has no basis in maritime law. 
While the phrase first appeared in the 1860 novel "Harrington: A Story of True Love", by William Douglas O'Connor, the first documented application of "women and children first" was in May 1840 when, after a lightning strike, fire broke out aboard the American packet "Poland" en route from New York to Le Havre. According to a passenger, J.H. Buckingham of Boston:
This led to a precautionary evacuation of women, children and a few male passengers into the longboat, while the other male passengers and crew remained aboard to fight the blaze. As Buckingham was a journalist, his vivid account of the incident was published first in the "Boston Courier", picked up by other papers including "The Times" (London) and also reprinted in a book published in the same year, thus gaining wide currency.
A more noted instance occurred during the 1852 evacuation of the Royal Navy troopship . It is, however, most famously associated with the sinking of RMS "Titanic" in 1912.
According to disaster evacuation expert Ed Galea, in modern-day evacuations people will usually "help the most vulnerable to leave the scene first, likely to be the injured, elderly and young children."
In the Boy Scouts of America's Sea Scouting program, "Women and children first" is considered "the motto of the sea".
History.
19th century.
A well-known appearance of the phrase "women and children first" occurred in the 1860 novel "Harrington: A Story of True Love", during the recounting of the death of Captain Harrington, the father of the eponymous character John Harrington. Captain Harrington's fictional death illustrates not only the concept of "women and children first" but also that of "the captain goes down with his ship".
During the nineteenth and early twentieth centuries, ships typically did not carry enough lifeboats to save all the passengers and crew in the event of disaster. In 1870, answering a question at the House of Commons of the United Kingdom about the sinking of the paddle steamer "Normandy", George Shaw-Lefevre said that,
The practice of women and children first arose from the actions of soldiers during the sinking of the Royal Navy troopship in 1852 after it struck rocks. Captain Robert Salmond RN ordered Colonel Seton to send men to the chain pumps; sixty were directed to this task, sixty more were assigned to the tackles of the lifeboats, and the rest were assembled on the poop deck in order to raise the forward part of the ship. The women and children were placed in the ship's cutter, which lay alongside. The sinking was memorialized in newspapers and paintings of the time, and in poems such as Rudyard Kipling's 1893 "Soldier an' Sailor Too".
20th century.
By the turn of the 20th century, larger ships meant more people could travel, but regulations were generally still insufficient to provide for all passengers: for example British legislation concerning the number of lifeboats was based on the tonnage of a vessel and only encompassed vessels of "10,000 gross tons and over". The result was that a sinking usually involved a moral dilemma for passengers and crew as to whose lives should be saved with the limited available lifeboats.
The phrase was popularised by its usage on the . The Second Officer suggested to Captain Smith, "Hadn't we better get the women and children into the boats, sir?", to which the captain responded: "put the women and children in and lower away". The First and Second officers (William McMaster Murdoch and Charles Lightoller) interpreted the evacuation order differently; Murdoch took it to mean women and children "first", while Lightoller took it to mean women and children "only". Second Officer Lightoller lowered lifeboats with empty seats if there were no women and children waiting to board, while First Officer Murdoch allowed a limited number of men to board if all the nearby women and children had embarked. As a consequence, 74% of the women and 52% of the children on board were saved, but only 20% of the men. Some officers on the "Titanic" misinterpreted the order from Captain Smith, and tried to prevent men from boarding the lifeboats. It was intended that women and children would board first, with any remaining free spaces for men. Because not all women and children were saved on the "Titanic", the few men who survived, like White Star official J. Bruce Ismay, were initially branded as cowards.
21st century.
There is no legal basis for the protocol of women and children first in international maritime law.
A more recent application of "women and children first" occurred in March 2011, when a floating restaurant in Covington, Kentucky tore from its moorings and stranded 83 people on the Ohio River. Women were rescued first, but there were no casualties.