Today the Talmud discussed marking graves, which is allowed and encouraged during hol hamoed, the middle days of a festival when most work is forbidden. Our sages bring various sources for the concept of marking graves.
Burying the dead is not an explicit Biblical command, but we learn that it is very important since every human being is made in the image of God (Genesis 1:27), and since God Himself buried Moses (Deuteronomy 34:6). The Talmud (Sotah 14a) explains that Deuteronomy 13:5, which commands us to “walk after God”, means to emulate Him by clothing the naked, visiting the sick, and burying the dead and the like.
Historically, many cultures were not careful to bury their dead with due respect, unless the deceased was rich or high in social status. The Pharaohs of Egypt are an example of this. Commoners did not usually enjoy what we today consider a proper burial.
Often people who could not afford a nice funeral left corpses of family members laying around or interred them wherever convenient. Our ancient sages observed that lands outside of Israel had corpses buried all over the place, and without markings, causing ritual contamination (this affected Queen Helena, Talmud Nazir 19b).
Respectful burial in cemeteries with marked graves is commonplace in modern society precisely because the ancient Jews began this trend. In fact, this concept began as “Tikkun Olam”, literally meaning fixing the world. Tikkun Olam is a Jewish doctrine that is often misunderstood and invoked to endorse various social causes and obtain donations from Jews.
Tikkun Olam really means setting an example of proper behaviors so other people emulate you. The Talmud explains (Gittin 61a) that we allow non-Jews to take the gleanings from Jewish fields, we give charity and care for the sick without regard to their faith or nationality, and we bury dead gentiles along with dead Jews. See also Ketuvot 72a.
This is not simply being charitable and doing the right thing. The whole point is to set an example of better behavior for everyone to follow, since everyone benefits. Imagine the intense learning experience when a pagan family had left the body of a family member to rot, then Jews came along and took the time to bury it with respect. They would have felt embarrassed and realized that there is a good reason to honor the deceased.
Tikkun Olam is not about pushing an agenda on other people or giving money for a cause. It means optimizing your own behavior to show other people a better way to live through your personal example. If people are talking about changing the world, but they are not changing themselves, they are not engaged in Tikkun Olam at all.
One of the hints to burying and marking graves is “And to him who orders his road, I will show the salvation of God” (Psalms 50:23). This is understood to mean keeping the road clear of ritual impurity by marking graves. Rabbi Yehoshua ben Levi has another reading of the verse: Whoever appraises his own ways merits seeing the salvation.
This means getting your path through life in order by planning ahead and setting goals. Rashi explains that the intent is that you weigh your options, considering the costs and benefits of each possible path. Men have the intellectual capacity to analyze and straighten our their situation, but this is not often used.
The first step is deciding your mission, the road you want to take through life. Your mission must be what actually makes you happy and fulfilled; not what earns approval from other people. Another level to your planning is thinking about how your actions and success will set an example for other men to follow, and how you can inspire and mentor the next generation to achieve their own goals. That is Tikkun Olam, changing the world through improving yourself.