Why Concrete?

I have often wondered Why concrete, but as Dominic my son reminded me.  I was born in a concrete block house mother and father built  during the 1930 depression.  On march the 8th 1958 I walked pushing dads wheelbarrow to Greens the local builder and bought my first two bags of cement.   I was 19 years old, no money, but lots of ideas .  After digging sand out of the garden, I mixed by hand my first  batch of concrete 12 no. 24 x 24 x 2 inch paving slabs.  80 Million products later we are still developing and casting new innovative concrete products.