Randomness

Randomness is the lack of pattern or predictability in events. A random sequence of events, symbols or steps has no order and does not follow an intelligible pattern or combination. Individual random events are by definition unpredictable, but in many cases the frequency of different outcomes over a large number of events (or "trials") is predictable. For example, when throwing two dice, the outcome of any particular roll is unpredictable, but a sum of 7 will occur twice as often as 4. In this view, randomness is a measure of uncertainty of an outcome, rather than haphazardness, and applies to concepts of chance, probability, and information entropy.

The fields of mathematics, probability, and statistics use formal definitions of randomness. In statistics, a random variable is an assignment of a numerical value to each possible outcome of an event space. This association facilitates the identification and the calculation of probabilities of the events. Random variables can appear in random sequences. A random process is a sequence of random variables whose outcomes do not follow a deterministic pattern, but follow an evolution described by probability distributions. These and other constructs are extremely useful in probability theory and the various applications of randomness.

Bob Marley

Robert Nesta "Bob" Marley, OM (6 February 1945 – 11 May 1981) was a Jamaican reggae singer, songwriter, musician, and guitarist who achieved international fame and acclaim. Starting out in 1963 with the group The Wailers, he forged a distinctive songwriting and vocal style that would later resonate with audiences worldwide. The Wailers would go on to release some of the earliest reggae records with producer Lee "Scratch" Perry.

After the Wailers disbanded in 1974, Marley pursued a solo career upon his relocation to England that culminated in the release of the album Exodus in 1977, which established his worldwide reputation and produced his status as one of the world's best-selling artists of all time, with sales of more than 75 million records.Exodus stayed on the British album charts for fifty-six consecutive weeks. It included four UK hit singles: "Exodus", "Waiting in Vain", "Jamming", and "One Love". In 1978 he released the album Kaya, which included the hit singles "Is This Love" and "Satisfy My Soul".

Slavery

Slavery is a legal or economic system in which principles of property law are applied to humans allowing them to be classified as property, to be owned, bought and sold accordingly, and they cannot withdraw unilaterally from the arrangement. While a person is a slave, the owner is entitled to the productivity of the slave's labour, without any remuneration. The rights and protection of the slave may be regulated by laws and customs in a particular time and place, and a person may become a slave from the time of their capture, purchase or birth.

Today, chattel slavery is unlawful in all countries, but a person may still be described as a slave if he or she is forced to work for another person without an ability on their part to unilaterally terminate the arrangement. Such situations are today commonly referred to as "practices similar to slavery". The present form of the slave trade is commonly referred to as human trafficking.

Slavery existed before written history and in many cultures. It was once institutionally recognized by most societies, but has now been outlawed in all countries, the last being Mauritania in 2007. However, it continues through such practices as debt bondage, serfdom, domestic servants kept in captivity, certain adoptions in which children are forced to work as slaves, child soldiers, human trafficking and forced marriage. Accordingly, there are more slaves today than at any time in history, with an estimated 20 million to 36 million slaves worldwide.