He used instances like the Quit India Movement, Green Revolution and the IT Revolution in which the Left have refused to participate.
"The Left that rules the state has unfortunately often been on the wrong side of history. When Mahatma Gandhi started Quit India movement the Left did not participate in it. When India became Independent, they said this independence is not for real," he said.
He recalled the Green revolution started by Indira Gandhi and said that the Communists opposed it saying it would only benefit the foreign seed companies. He said, when it came to the communications revolution initiated by Rajiv Gandhi the communists opposed it stating that it would take away jobs.
"When our government started nuclear deal with the US to end India's nuclear isolation and to provide the much-needed energy for development, the Left opposed and walked out of our government. Time will prove the wisdom of our decision," the Prime Minister said.
He hinted at event of Communist party joining hands with the Third Front and asked people to choose between a 'stable' congress or coalition of parties.
He said that the third front would never achieve a government at the centre as it would only divide the secular votes in turn helping BJP.
He further added that the 'restrictive politics' of the front will obstruct the investments. And its 'unfriendly' policies will keep the state from developing.