The Pakistan Resolution was passed in 1940 at Lahore. Muslim League made this resolution its main objective election campaigns. Soon after World War II, the British were convinced that keeping British colony in South Asia was no longer possible, as the United Kingdom itself was economically shattered by the war. British South Asia was divided into Pakistan and India.
The idea of Pakistan was presented by Allama Iqbal in 1930. Iqbal asked Jinnah to focus his energies towards getting an independent homeland for Muslims of the South Asia.
"I would like to see the Punjab, North-West Frontier Province, Sind and Baluchistan amalgamated into a single State. Self-government within the British Empire, or without the British Empire, the formation of a consolidated North-West Indian Muslim State appears to me to be the final destiny of the Muslims, at least of North-West India." Sir Muhammad Iqbal's 1930 Presidential Address, from Columbia University site
"At this solemn hour in the history of India, when British and Indian statesmen are laying the foundations of a Federal Constitution for that land, we address this appeal to you, in the name of our common heritage, on behalf of our thirty million Muslim brethren who live in PAKSTAN - by which we mean the five Northern units of India, Viz: Punjab, North-West Frontier Province (Afghan Province), Kashmir, Sind and Baluchistan - for your sympathy and support in our grim and fateful struggle against political crucifixion and complete annihilation."Now or Never; Are we to live or perish forever? (1933), Pakistan History Website
"It is extremely difficult to appreciate why our Hindu friends fail to understand the real nature of Islam and Hinduism. They are not religious in the strict sense of the word, but are, in fact, different and distinct social orders, and it is a dream that the Hindus and Muslims can ever evolve a common nationality, and this misconception of one Indian nation has troubles and will lead India to destruction if we fail to revise our notions in time. The Hindus and Muslims belong to two different religious philosophies, social customs, literatures. They neither intermarry nor interdine together and, indeed, they belong to two different civilizations which are based mainly on conflicting ideas and conceptions. Their aspect on life and of life are different. It is quite clear that Hindus and Mussalmans derive their inspiration from different sources of history. They have different epics, different heroes, and different episodes. Very often the hero of one is a foe of the other and, likewise, their victories and defeats overlap. To yoke together two such nations under a single state, one as a numerical minority and the other as a majority, must lead to growing discontent and final destruction of any fabric that may be so built for the government of such a state." Excerpt from the Presidential Address delivered by Quaid-i-Azam at Lahore, March 22-23, 1940, Nazariapak.info