Why would Athens be more open to attack?

Athens could be more open to attack due to its strategic location and reliance on sea trade, making it vulnerable to naval assaults. Additionally, its democratic governance might lead to internal divisions, weakening its defense. The city's emphasis on cultural and intellectual pursuits may result in less focus on military preparedness compared to other city-states, further exposing it to potential threats. Lastly, its expansive empire can stretch resources thin, making it challenging to defend all territories effectively.