The Beatles did change the world. The Fab Four from Liverpool not only wrote the book on songwriting, but in their later years emerged as champions of a better, freer, more tolerant world.

And none symbolised that more than John Lennon [ Images ], who would have been 70 years old on October 9, had he not been shot dead by a crazed fan.

Do you think in today's world of strife, Lennon's message of giving peace a chance and imagining a world free of borders is possible?

Let's pause to think about it, even as we remember the legend on his 70th birth anniversary.