Question: Chindia is a portmanteau word that refers to China and India together in general, together, they contain over one-third of the total number of humans currently living, and is called?

In human genetics, the Y-chromosomal most recent common ancestor (Y-MRCA, informally known as Y-chromosomal Adam) is the most recent common ancestor (MRCA) from whom all currently living humans are descended patrilineally.  The term Y-MRCA reflects the fact that the Y chromosomes of all currently living males are directly derived from the Y chromosome of this remote ancestor.  The analogous concept of the matrilineal most recent common ancestor is known as "Mitochondrial Eve" (mt-MRCA, named for the matrilineal transmission of mtDNA), the most recent woman from whom all living humans are descended matrilineally.  As with "Mitochondrial Eve", the title of "Y-chromosomal Adam" is not permanently fixed to a single individual, but can advance over the course of human history as paternal lineages become extinct. <SEP> Thomistic sacramental theology is St. Thomas Aquinas's theology of the sacraments of the Catholic Church.  It can be found through his writings in the "Summa contra Gentiles" and in the "Summa Theologiæ".  As can be seen, Aquinas relied heavily on Scriptural passages, as well as the writings of various Church Fathers.  St. Augustine says (De Civ.  Dei x): The visible sacrifice is the sacrament.  This is the sacred sign of the invisible sacrifice.  A thing is called a sacrament, either by having a certain hidden sanctity, and in this sense a sacrament is a sacred secret; or from having some relationship to this sanctity.  A sacrament is a sign.  Moreover, it is a sacred sign.  Divine Wisdom provides for each thing according to its mode.  Wisdom 7,1 : "she... ordered all things sweetly"; and from Matthew 25,15: "[she] gave to everyone according to his proper ability."  It is a part of human nature to acquire knowledge of the intelligible from the sensible.  A sign is the way one obtains knowledge of something else.  The sacraments are the signs by which humans gain knowledge of spiritual and intelligible goods.  Ephesians 5, 25-26: "Christ loved the Church, and delivered Himself up for it; that He might sanctify it, cleansing it by the laver of water in the word of life."  St. Augustine says (Tract.  xxx in John): "The word is added to the element, and this becomes the sacrament."  Augustine (Contra Faust xix): "It is impossible to keep men together in one religious denomination, whether true or false, except they be united by means of visible signs or sacraments."  It is necessary for salvation that humans united together in the name of true religion.  Therefore, sacraments are necessary for man's salvation.  There are three reasons sacraments are necessary to the salvation of humans: First, it is in the nature of humans to be led by things corporal and sensible to things that are spiritual and intelligible.  Second, by sinning, humans have subjected themselves to corporeal things.  Therefore, it is proper that the remedy have a corporeal side, leading to the spiritual.  Third, humans are prone to direct their activity towards material things (things that can be seen and felt).  Sacraments are made necessary because humans have sinned.  The main effect of the sacraments is grace, in particular those involving Virtues and Gifts.  Grace perfects the soul and allow participation in the Divine Nature.  Furthermore, the effects of the sacraments is justification.  This is an interior effect.  Romans 8,33: "God justifies."  Therefore, the effects of the sacraments is justification.  This is an interior effect.  The power of the sacraments is from God, alone.  It does not matter that the minister of the sacraments may be a sinner, or evil.  Augustine (commenting on John 1,33): "He upon Whom you shall see the Spirit, ...that John did not know that our Lord, having the authority of baptizing, would keep it to Himself, but that the ministry would certainly pass to both good and evil men...What is a bad minister to you, wherever the Lord is good?" <SEP>  The world population was estimated to have reached 7.5 billion in April 2017 . In demographics, the world population is the total number of humans currently living.  The United Nations estimates it will further increase to 11.2 billion by the year 2100. <SEP> Chindia is a portmanteau word that refers to China and India together in general.  The credit of coining the now popular term goes to Indian Member of Parliament Jairam Ramesh.  China and India share long borders, are both regarded as growing countries and are both among the fastest growing major economies in the world.  Together, they contain over one-third of the world's population (nearly 2.7 billion).  They have been named as countries with the highest potential for growth in the next 50 years in a BRIC report.  BRIC is a grouping acronym that refers to the countries of Brazil, Russia, India and China.