Why can the pawn move two squares on the first move?

Answer 1

This power of moving two spaces on the Pawn's first move was done , to make the game more interesting and to enable 'en passant' capture(s) , in the 15th Century .

Answer 2

A pawn never has two moves, but its initial move can be two squares.

Answer 3

Each individual pawn can move two spaces on its first move

Answer 4

A pawn may move forward either one or two spaces when making the pawn's first move.