That first man is a fool!

Prayer only works if there are two or more people doing it!

Again, truly I tell you that if two of you on earth agree about anything they ask for, it will be done for them by my Father in heaven. For where two or three gather in my name, there am I with them.

Matthew 18:19

This implies that there has never been two christians gathered together and praying for world peace or to end world hunger