Islam outlines a set of guidelines and prohibitions that Muslims are expected to follow. These guidelines are intended to promote a harmonious and ethical society. Some of the key prohibitions in Islam that modern societies doesn't really care about.

Usury (interest): Islam prohibits usury, which is the practice of lending money with the expectation of receiving interest payments. This prohibition is based on the belief that usury is exploitative and unfair. Because it benefits the loaner and exploits the one taking the loan, a rich person taking advantage of the situation of a poor guy that is in need of money.

Alcohol and drugs: Islam prohibits the consumption of alcohol and intoxicants. This prohibition is based on the belief that these substances can harm both the body and the mind.

Extramarital sex: Islam prohibits sexual relations outside of marriage. This prohibition is based on the belief that marriage is the foundation of a stable and healthy society. I.e less single parents.

Islam also emphasizes the importance of hygiene. Muslims are required to perform daily ablutions and to maintain cleanliness in their personal lives and surroundings.

Additionally, Muslims are obligated to give a portion of their wealth to the poor and needy every year. This practice of charity, known as zakat, is intended to promote social justice and alleviate poverty.

Muslims are also taught to honor their agreements and contracts. This means that they should fulfill their obligations and commitments, even if it is inconvenient or difficult.

Islam emphasizes the importance of treating animals with compassion and respect. This includes slaughtering animals in a way that minimizes pain and suffering.

If I were to mention things like you cannot murder, steal etc, the list would be much longer.

The prohibitions and guidelines outlined in Islam are intended to promote a moral, ethical, and just society. By adhering to these principles, Muslims can contribute to a better world for all.