You are free to imagine a world without religion as per the silly ditty of John Lennon, but if Pew Research Center predictions are correct, atheists and leftists need to brace themselves for serious disappointment:
. . . the religiously unaffiliated population is projected to shrink as a percentage of the global population, even though it will increase in absolute number. In 2010, censuses and surveys indicate, there were about 1.1 billion atheists, agnostics and people who do not identify with any particular religion.5 By 2050, the unaffiliated population is expected to exceed 1.2 billion. But, as a share of all the people in the world, those with no religious affiliation are projected to decline from 16% in 2010 to 13% by the middle of this century.
The above hyperlink via Richard Fernandez, The Easter of Crisis. An excellent column. Read it!
In the first article below I lay into Michael Walzer, one of the smarter lefties, for his failure to understand both religion and the human heart.
Finally, if you have a hankering to imagine things, then I suggest you
Imagine No 'Imagine'
Imagine no 'Imagine'
It's easy if you try
No more lefty lyrics
Above us more than sky.
You may say I'm a dreamer
But I'm not the only one
I hope some day you'll join us
And Lennon's song'll go unsung.