Two characters are escaping from something. One of them falls down, breaks a leg and says "Leave me, I Will Only Slow You Down". The other one says, " I won't leave without you!" and takes his wounded friend with him. Possibly even requiring, as soon as they reach some degree of safety, that the wounded character gets evacuated first.
In more hard-pressed situations, the character must stand over the fallen friend and fight off enemies, all the way up to the grim Last Stand. In case of close comrades, such as Blood Brothers, or beloved commanders, this may be done even if the fallen friend is dead and not just wounded, and the heat of battle may make it impossible to tell whether the fallen character had just been wounded or had died. And if the dead character has Royal Blood or Blue Blood, this may have a grim necessity: they need to be able to prove that the character died to ensure that the succession goes smoothly in time of crisis. This trope is often used to generate drama in a situation that calls for a Heroic Sacrifice.
“Let no one be left behind” is a slogan adopted by many to stress the goal of its commitment that no one is left by the wayside as they pursue their dreams in life.
In a family situation for instance where the husband has to leave the wife and children to seek greener pasture in other land, the principle that "Let no one be left behind" should also apply as family relationship is at stake.
Mt 5:32 but I tell you that whoever puts away his wife, except for the cause of sexual immorality, makes her an adulteress; and whoever marries her when she is put away commits adultery.
Let poverty therefore be not the reason for the husband and wife separation except with consent and come together again for a certain period of time to satisfy the desire of the flesh.
1 Cor 7:5 Defraud ye not one the other, except with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan may not tempt you for your incontinence.
This commandment is given because God knows that the flesh is weak and that the wife is a weaker vessel and can be easily tempted.
Mk 14:38 Watch ye and pray, lest ye enter into temptation. The spirit truly is ready, but the flesh is weak.1 Pet 3:7 Likewise, ye husbands, dwell with them according to knowledge, giving honour unto the wife, as unto the weaker vessel, and as being heirs together of the grace of life; that your prayers be not hindered.
So the next time you think of escaping from poverty with a desire of providing comfortable living to your family, think of the consequence/s of going away.
1 Pet 5:8 Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:
Don't give Satan the chance to tempt and devour you. Save your marriage, bring with you your Wife and Children wherever you go and "Let No One Be Left Behind".
1 Tim 5:8 But if any provideth not for his own, and especially for those of his own house, he hath denied the faith, and is worse than an infidel.