I always thought u can get a leader only if u have used ur previous one , not to mention I rarely get scientific leaders at all. In my current game I have had 4 sofar(currently researching Music Theory) and got the last one while I had not used the 3rd one , so now have 2 scientific leaders ! (2 ALs) I wanna know if this can also happen with Military leaders and how many leaders u can have at the same time ?