One advantage that a parliamentary democracy has over a presidential one is that
1)the person elected as leader of a parliamentary democracy (typically called a prime minister) is always the most popular politician in the nation, so it is easy to find public support for their policies
2)compromise is typically easier to reach
3)voters feel invested in politics since their votes directly elect the national executive
4)the leader of a parliamentary democracy (typically called a prime minister) has no political ties to members of parliament and so can act more independently than a president often can