By Shaikh Muhammad bin Jameel Zainoo is one of the contemporary scholars of Islam. A student of Shaikh Al-Albaanee, he has written many valuable works on Islam. Source: The Methodology of the Saved Sect.

When pure tawheed is actualised in the life of an individual or the society it produces the best of results. From its results are the following:

1) Liberation of mankind from worship and submission to other than Allaah. The creation cannot create anything, rather they themselves are created. They are not capable of harming nor benefiting their souls. They are not capable of causing death nor giving life nor are they able to resurrect the dead.
So tawheed liberates man from every worship, except to his Lord, the One Who created him and then proportioned him.
It liberates his intelligence from deviation and delusions.
It liberates his mind from obedience, humility and submission to other than Allaah.
It liberates his life from the mastery of the rulers, the soothsayers and those who deem themselves divinely appointed over the slaves of Allaah.
Due to this, the leaders of shirk and oppression in the times of ignorance rose up against the call of the Prophets in general and particularly against the call of the Messenger, because of the fact that they understood the meaning of "La ilaaha lila Allaah" to be a universal pronouncement for the liberation of mankind, and the overthrowing of the tyrants from their false thrones, and the elevation of the faces of believers, those who do not prostrate except to Allaah, the Lord of the Worlds.

2) The personality remains balanced. Tawheed aids the formation of a balanced personality, the preferred aim and direction of this life, and it unifies and consolidates its purpose. So the personality does not turn except to the only One worthy of worship, and it turns to Him in private and in open and it calls to him in private and in open, and it calls upon Him in ease and in adversity. As opposed to the Mushrik (pagan) who shares his heart between those who are worshipped besides Allaah, at times he turns to the living and at times he turns to the dead, and Yusuf said: Oh my two companions of the prison, are many different lords better, or Allaah, the One, the Irresistible? [12:39]
So, the believer worships One Lord, he knows what is pleasing to Him and what is displeasing to Him, lie stops at whatever pleases Him and his heart becomes calm.
As for the Mushrik, lie worships numerous deities, one he takes from here and another he takes from there and he is divided between them and he has no comfort.

3) Tawheed is the source of security for the people, because it fills the soul of the individual with peace and satisfaction. He does not fear anyone except Allaah and tawheed blocks the ways to fear of loss in provisions, the soul and the family, fear from mankind, inn, death and other than that from those things which are feared.
The believer who worships Allaah alone. does not fear anyone except Him and because of this he feels secure whilst the rest of mankind fear and he feels satisfaction whilst the people are restless. This is the meaning that is indicated in the Qur'aan in His saying: Those who believe and do not mix their belief with dhulm, they are those upon whom is security and they are the rightly guided. [6:82]
This security emerges from the innermost depths of the soul and not from any police guard which is the security of this world. As for the security of the Hereafter, then it is greater and more lasting for those who are sincere to Allaah and do not mix their tawheed with shirk, because shirk is a greatdhulm.

4) Tawheed is the source for the strengthening of the soul, because it gives an individual a strong and formidable mental attitude, by which he fills his soul with hope in Allaah, confidence in Allaah and reliance upon Allaah, pleasure with His Decree, gives him patience upon His Tests and freedom from reliance upon the creation. This individual is firmly established, like the mountains, and when a calamity befalls him he asks his Lord to remove it and not the dead. The Prophet ﷺ indicated this in his saying: "When you ask, then ask Allaah and when you seek help, then seek help from Allaah alone. " [Hasan Sahih – Tirmidhi]
If Allaah touches you with harm, none can remove it except Him." [6:17]

5) Tawheed is the foundation of brotherhood and equality, because it does not permit following those who take others as lords besides Allaah, since worship is for Allaah alone and worship to Allaah alone must be from all of mankind, and the head of them is Muhammad ﷺ His Messenger and His chosen one.