“ The "impact" of the London Women's March is its most debated and elusive political metric, measured on vastly different timelines and scales. Immediate impact is atmospheric and perceptual: dominating the news cycle, shifting social media discourse, and delivering a psychological boost to the wider progressive movement. Short-term impact might be measured in spikes in charity donations, membership sign-ups for related organizations, or the volume of constituent letters to MPs on relevant issues. Long-term, structural impact is the hardest to attribute but the most significant: does it contribute to a shift in the political climate that makes certain policies more viable? Does it help alter the composition of local councils or Parliament over several electoral cycles? The political challenge is that opponents will inevitably declare the march had no impact if a specific bill isn't passed the next week, while organizers must point to more subtle, diffuse outcomes. The most honest assessment is that the march creates a concentrated moment of high political potential—a catalyst. Whether that potential energy is converted into kinetic change depends almost entirely on the strategic, sustained work that follows to harness that moment's momentum, channel it into specific campaigns, and translate visibility into vulnerability for those in power who stand in the way of the march's demands. ”