Among All the People

Impressively, Alma extended his missionary efforts across the whole of the lands inhabited by the Nephites. He visited every city and made sure all the people heard his message. It is unfortunate that in spite of all his time and effort, this was the result on the macro-level:

15 Now Alma, being grieved for the iniquity of his people, yea for the wars, and the bloodsheds, and the contentions which were among them; and having been to declare the word, or sent to declare the word, among all the people in every city; and seeing that the hearts of the people began to wax hard, and that they began to be offended because of the strictness of the word, his heart was exceedingly sorrowful (Alma 35).

Think of the powerful influence of this one man though. He was the means of bringing many, many souls back to the Lord.  Even though the majority rejected the message, still he changes countless lives, and at very least he was the means of giving everyone a fair chance to hear and accept the Gospel message. At this point not a single one of those who heard his message can ever come to him and say that he didn't tell them, that they didn't know the commandments or what God expected of them. They were at that point liable. Alma I would imagine had rid himself of their blood and sins.