Strengthening the relationship between kinship and relatives could be compared to the development of a plant's trunk, it becoming stronger with the command of Allah, so it is preserved and protected from external influences. In the holy Qur’an, the rights of Allah and the rights of parents and relatives are mentioned together in many verses.

As Allah says: "Worship Allah and associate nothing with him and do good to parents, relatives…"(An-Nisa': 36). Allah says: "And your Lord had decreed that you not worship except him and to parents, good treatment" (Al-Isra’: 23). He says again: "And give the relatives his rights"(Al-Isra’: 26).

The virility and manhood of a person is represented in maintaining good relationship with kinship, doing good deeds, falling to mistakes that are tolerable and excuses that are acceptable. By maintaining good relations with kinship, harmony and love can be increased and the bond will be become stronger, hatred can be vanished and a person will always long for his relatives and family.
In the Hadith, it was reported that the Messenger (PBH) said: "Maintaining good relationship with kinship, increases love between the family and a means of increasing wealth and keeping good reputation and having more descendants" (Thurmudi, Hakim).

By maintaining good relations with kinship, one’s life is prolonged, and sustenance and provisions is blessed and increased, happiness and prosperity become the natural consequence, and one protects himself from the evil ends.
   

If Allah blessed a person and enabled him to be the kind that is close to the heart who loves his family and his family loves him, he is soft with his relatives and close to his tribe. With this kindness, he will win over his enemies and protect himself from those who envy him. The favors will be preserved for him; his life would be easy in all its aspects. He would be protected from humiliation and the best of people are the most beneficial to people.

The wise persons realize that keeping harmony and maintaining good relation with family and kinship results in support, love, and protection from betrayal and disunity. The person that is merciful, keeps good relations, and is generous; Allah gives a good reputation and remembrance among people in life and death. In addition, tongues will always praise him and hands will rise up in supplication for him.
He who keeps and maintains good relations with kinship and relatives, Allah will love him and people will love him.

Islam advocates obvious directives and strict procedures for the firm existence of important social institutions such as family and neighborhood. 
As an encouraging for maintaining family relations, we see several facts in prophetic words. Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah (Peace and Blessing of Allah be upon him) said, "A Dinar you spend in Allah's way, or to free a slave, or as a charity you give to a needy person, or to support your family, the one yielding the greatest reward is that which you spend on your family" [Muslim].
Here, a Muslim is ordained to spend first of all on the need of his wife and children and their food and clothes. There is greater reward for him in this because these expenses are obligatory on him while spending on other items is in the nature of desirable deed. Obviously, one cannot forego the former for the latter.
Family protection is a duty. Meanwhile, Prophet (PBH) encourages the individuals to maintain this relation, promising them great rewards from the Almighty even for looking after their own children.
In the Hadith, it was also reported that Prophet (PBH) said: “Allah ensured one that I will protect him who kept the family relation and split the connection with those who split family relation”. In another Hadith it can be seen that the Almighty Allah has cursed one who cuts his family relations. Both Imam Bukhari and Muslim (May Allah Mercy upon them) reported that the Messenger of Allah (PBH) mentioned that one of the three most delightful things for Allah is the good deeds for the sake of parents. 
Moreover, Islam preaches to honor and firm the relationship with the friends of our parents after their death.  These doctrines encourage ensuring the vast series of social relations. 
In the view of our beloved Prophet (PBH), a neighbor is not a mere one who stay nearby our home, instead, it is a wide area including 40 houses in all directions. Islam puts forward many strict directives for this vast neighborhood. Abu Hurayrah (May Allah Pleased with him) reported: "By Allah, he will not be a believer!" when the prophet (PBH) said it three times, he was asked: “Oh Messenger of Allah! Who is he?" He said: "Someone whose neighbor is not safe from his mischief" [Bukhari and Muslim].
Ibn 'Umar and 'A'isha (May Allah Pleased with them) reported: "The Messenger of Allah (PBH) said: 'Jibril (A) continued to advise me to be good to my neighbor until I thought that he would have me make him my heir" [Bukhari and Muslim].
Prophet (PBH) suggested sharing the foods among the neighbors.
In one variant, Abu Dharr said, "My beloved Rasool(PBH) advised me, 'When you cook a stew, put a lot of water in it and then go and see the people of a neighboring house and give them a reasonable amount of it."