Political extremism can have detrimental effects on social cohesion by fostering division and polarization within communities. Extremist ideologies often cultivate an 'us versus them' mentality, leading to conflict and mistrust among various social groups. This fragmentation undermines the fabric of social interaction and can incite violence or civil unrest. Additionally, extremism can discourage open dialogue, making it challenging for diverse perspectives to find common ground, thereby jeopardizing overall social stability and diminishing the potential for collaborative solutions to societal issues.