Since 1960, the birth rate worldwide has been steadily declining and the current average is 2.5 children per woman. However, there are big differences between countries. While in Japan the fertility rate is 1.36 children per woman, in Niger it is 6.82 children per woman. The age of majority is the age threshold recognized in the legal system in which the person reaches adulthood. This is the time when minors cease to be considered as such and take legal control over their persons, actions and decisions, thus ending the control and legal responsibility of their parents or guardians towards them. Most countries set the age of majority at 18, but some jurisdictions have a higher age and others a lower age. The word majority here refers to being older and being of legal age, as opposed to minority, being a minor. The term usually refers to a set of laws that grant adult status. Minors are called minors and may be denied certain legal privileges such as voting, purchasing and consuming alcoholic beverages, purchasing tobacco or cannabis products, gambling, buying a lottery, marriage, buying or possessing firearms, possessing property, entering into binding contracts or obtaining full driving privileges.
 In Spain: Since a teenager reaches the age of 18, he can vote and be elected in all kinds of elections, obtain a driving license, access public, dangerous or night jobs and conclude valid contracts without the signature of a guardian. At 18, the purchase of tobacco or alcohol is also approved throughout the country, although there are communities where this is possible from the age of 16. Historically, the age of majority was 18 and even 24. Given all this data, the conclusion is delusional: a 14-year-old woman is younger to mop but not have sex, and at 16 she is less to drink, but not to give up an abortion pill. At that age, his parents are responsible for making sure he doesn`t smoke, but they don`t have the right to access his notes, according to Madrid`s Data Protection Authority. In legal systems, it is customary not to recognize the legal autonomy of children because of their lack of maturity and therefore not to ask them to take responsibility for their decisions (cf. Aceprensa, 22-12-1999: „What rights cannot give“), Without a previous script, the newcomer gathers 50 and 100 guests in his favorite album. Cotillion, champagne, ballerinas, gogos, giant cakes…, it all depends on the length of the host. The 18-year-old parties have ceased to be the legacy of good children, and it is not uncommon for guests to pay the entrance, cheap, than yes, and not damaged by the host who gives with a round. In the hangover of the next day, reflection will come.
„The jump from 17 to 18 is morally the key moment.“ Javier Elzo, sr., professor of sociology in Deusto and coordinator of the study on young Spaniards, describes some eighteen-year-olds who are rich, overprotected, satisfied with life, better prepared than any previous generation and afraid to fly out of the nest. Only three out of 100 18-year-olds have done the petate. What`s disheartening is that almost half of Spaniards think they`re still a waiter to walk around at 25. At this age, only a third of British women are at home and most French people already know what emancipation is. Not to mention Holland or Germany, where it`s no surprise that 20-year-old students flee to another residence in the same city and share the rent with foreigners. Only the Italian mother keeps her offspring longer than the Spaniards. In many countries, minors can be emancipated: depending on the jurisdiction, this can be done through acts such as marriage, economic self-sufficiency, obtaining a diploma or diploma of studies or participation in some form of military service. In the United States, each state has some form of emancipation of minors.  In a world where 150 million children still did not have the guarantee of adequate nutrition and where 5 million died each year from preventable diseases, the most important workhorse for the European Union and other Western countries – as at the Cairo and Beijing conferences – was the right to „reproductive health services“. This did not exclude abortion for teenage girls, and one idea of sex education focused on the use of contraceptives. When drafting these and other international documents, there is always pressure to introduce a „right to privacy of minors“ so that they can obtain contraceptives or even abort without parental permission.
Over the next few decades, the world`s population will grow exponentially, especially in India, Nigeria, Pakistan, Indonesia and the United States. If current forecasts are met, Africa will have twice as many people by 2050 as it does today. In all matters concerning physical safety and health, the laws recognize less and less autonomy for the minor. In September 2008, the general regulation for drivers was amended, so that from 2010, 14 years will no longer be enough to drive mopeds: they must have 15 birthdays. Even the age of 16 is not enough to be able to carry passengers on a moped, but 18 years. In El Salvador and Honduras, 15 years ± is considered the age of consent; while in Cuba, Nicaragua, Peru, Venezuela and Guatemala, they increase it to 16. Already in the 18 years ±this is the age that is assumed in many parts of the world, are Bolivia, Panama and Uruguay. In addition, like©Mexico, the United States has differences in its©states, although it generally considers 18 to be the legal age of consent. For the rest of the world, seven European countries set the age of consent at 14 ±: Austria, Bulgaria, Estonia, Germany, Hungary, Italy, Portugal and Bulgaria. 15 years is the right age in Croatia, Czech Republic, Denmark, Greece, Poland, Romania, Slovakia, Slovenia, Sweden and France. The 16 ± are those established in Belgium©±, Lithuania, Latvia, the Netherlands, Latvia, Finland, Luxembourg and Spain; on the 17th in Cyprus and Ireland and on the 18th in Malta, which makes it a European territory that requires more age in this area. In most Middle Eastern countries, it`s not a matter of age, but extramarital relationships are illegal and punishable.
In the case of Africa, Angola has the maximum age of 12± and 18 in a large majority of countries. Yet a recent study by the Ministry of Health found that 35% of 14-year-olds and adults admit to getting drunk at least once a month. Night trips and the growing phenomenon of the bottle favor it. It should be noted that all U.S. citizens over the age of 18 can participate in federal elections, as provided for in the Constitution. In 1984, Congress adopted the national minimum age for alcohol consumption at 21, the legal minimum age for the purchase of alcoholic beverages. Looking at the rest of Latin America©, the countries that assume they already have the maturity to legally consent to sexual intercourse at the age of 13± are Argentina and Costa Rica (except in the second case, where the larger counterpart cannot exceed the 13-±-year-old in more than five years). They are persecuted by Colombia± Ecuador, Brazil and Puerto Rico at a minimum age of 14, even©in the case of the Caribbean island±a, if the couple does not exceed 18 years. Two other countries, Chile and Paraguay, set the age of consent at 14 ±, but reserve that this applies only to heterosexual relationships.
When it comes to same-sex relationships, Chile sets the bar higher at 18 ± and Paraguay at 17. In Europe, the United Kingdom (16 years old) is the country where adulthood is reached the earliest. In most countries of the world, the age of majority begins at 18: Argentina, Australia, France, Russia, Ghana, Barbados, Iraq, Chile, China, Switzerland, Lebanon, Tanzania, Denmark, Uzbekistan. As far as tobacco is concerned, the minimum legal age for the purchase of cigarettes in almost all of Europe is 18 years, with the exception of the Netherlands, which allows the purchase at 16 years.