Of the total number of people that had ever lived on the planet Earth we still make up for around 10% of that number. So lucky? Yes indeed! But not soooo damn lucky. But i think it really comes down to how back one may choose to count the total number of humans that ever lived, this 10% figure takes the number from as far back as 50 thousand years and compares it with the number of people alive today. But i think if we stretch further back or even include other primates or animals with large enough brain to have sense of self then yes we all must be soooooooooooooo damn lucky to be where all of us are now.