Following its defeat in 1952, the SLFP marshaled its forces in preparation for the next national election. The 1956 election was destined to become a turning point in the modern history of Sri Lanka and is seen by many observers as a social revolution resulting in the eclipse of the Westernized elite. S.W.R.D. Bandaranaike campaigned as the "defender of a besieged Sinhalese culture" and demanded radical changes in the system. Bandaranaike came from a family of Westernized Sinhalese and was educated at Oxford, but early in his political career, he rejected many of the Western elements of his background and embraced the Buddhist faith and adopted native garb (regarded at the time as an affectation among members of his class). Bandaranaike brought to the election a deep knowledge of the passions that communal politics could provoke. His Sinhala Maha Sabha, founded in 1937 as a movement within the Ceylon National Congress, was the only wing of the congress at that time that sought to infuse a Sinhala consciousness into Sri Lankan nationalism. The Sinhala Maha Sabha formed the backbone of Bandaranaike's SLFP and helped spread his 1956 election warning that Buddhism was in danger. Accusations of a "conspiracy" between the UNP and the Roman Catholic Church helped raise emotions feverishly. As one commentator put it, "Bandaranaike built up a popular following based on the Sinhalese dislike of Christian influence, essentially stoking the fires of communal and religious bigotry."

Bandaranaike and his supporters used the UNP's pro-Western stance as a potent propaganda weapon against the party. He claimed that the independence granted in 1948 was "fake" and that real independence could only be attained by severing all links with the Commonwealth of Nations. In economic matters, Bandaranaike planned to nationalize plantations, banks, and insurance companies. He advocated the control over trade and industry vested in Sinhalese hands. With such a radical platform, Bandaranaike managed to unite many disparate groups into his People's United Front (Mahajana Eksath Peramuna--MEP), a political coalition under the leadership of his SLFP formed to defeat the UNP. In addition, he was able to forge a no-contest pact with two Marxist parties, the LSSP and the CPSL.

The central and most explosive issue of the 1956 election was a linguistic one. After independence, it was commonly accepted that Sinhala and Tamil would replace English as the language of administration, but Bandaranaike announced that only Sinhala would be given official status if his coalition won the election. Bandaranaike introduced a dangerous emotionalism into the election with his "Sinhala only" platform, which labeled both Tamil and English as cultural imports.

The 2,500th anniversary of the death of the Buddha (which also marked the legendary landing of Vijaya and his followers on the island) coincided with the 1956 election, electrifying the political atmosphere. The UNP was susceptible to the emotional power of these issues. In what was later seen as a shameless last-minute reversal, the party al21d also espoused the "Sinhala only" program. This political about-face came too late to help the UNP, for the party lost the election, winning only eight seats in parliament. The People's United Front won the majority share of fifty-one seats.

Data as of October 1988